Abstract
Inteins catalyze a post-translational modification known as protein splicing, where the intein removes itself from a precursor protein and concomitantly ligates the flanking protein sequences with a peptide bond. Over the past two decades, inteins have risen from a peculiarity to a rich source of applications in biotechnology, biomedicine, and protein chemistry. In this review, we focus on developments of intein-related research spanning the last 5 years, including the three different splicing mechanisms and their molecular underpinnings, the directed evolution of inteins towards improved splicing in exogenous protein contexts, as well as novel applications of inteins for cell biology and protein engineering, which were made possible by a clearer understanding of the protein splicing mechanism.
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Hirata R, Ohsumk Y, Nakano A, Kawasaki H, Suzuki K, Anraku Y (1990) Molecular structure of a gene, VMA1, encoding the catalytic subunit of H(+)-translocating adenosine triphosphatase from vacuolar membranes of Saccharomyces cerevisiae. J Biol Chem 265:6726–6733
Kane PM, Yamashiro CT, Wolczyk DF, Neff N, Goebl M, Stevens TH (1990) Protein splicing converts the yeast TFP1 gene product to the 69-kD subunit of the vacuolar H(+)-adenosine triphosphatase. Science 250:651–657
Perler FB (1998) Protein splicing of inteins and hedgehog autoproteolysis: structure, function, and evolution. Cell 92:1–4
Liu XQ (2000) Protein-splicing intein: genetic mobility, origin, and evolution. Annu Rev Genet 34:61–76
Pietrokovski S (2001) Intein spread and extinction in evolution. Trends Genet 17:465–472
Gogarten JP, Senejani AG, Zhaxybayeva O, Olendzenski L, Hilario E (2002) Inteins: structure, function, and evolution. Annu Rev Microbiol 56:263–287
Perler FB (2002) InBase: the intein database. Nucleic Acids Res 30:383–384
Hall TM, Porter JA, Young KE, Koonin EV, Beachy PA, Leahy DJ (1997) Crystal structure of a Hedgehog autoprocessing domain: homology between Hedgehog and self-splicing proteins. Cell 91:85–97
Dassa B, Haviv H, Amitai G, Pietrokovski S (2004) Protein splicing and auto-cleavage of bacterial intein-like domains lacking a C′-flanking nucleophilic residue. J Biol Chem 279:32001–32007
Dassa B, Yanai I, Pietrokovski S (2004) New type of polyubiquitin-like genes with intein-like autoprocessing domains. Trends Genet 20:538–542
Perler FB, Olsen GJ, Adam E (1997) Compilation and analysis of intein sequences. Nucleic Acids Res 25:1087–1093
Tori K, Dassa B, Johnson MA, Southworth MW, Brace LE, Ishino Y, Pietrokovski S, Perler FB (2010) Splicing of the mycobacteriophage Bethlehem DnaB intein: identification of a new mechanistic class of inteins that contain an obligate block F nucleophile. J Biol Chem 285:2515–2526
Mootz HD (2009) Split inteins as versatile tools for protein semisynthesis. Chem Bio Chem 10:2579–2589
Elleuche S, Poggeler S (2010) Inteins, valuable genetic elements in molecular biology and biotechnology. Appl Microbiol Biotechnol 87:479–489
Vila-Perello M, Muir TW (2010) Biological applications of protein splicing. Cell 143:191–200
Volkmann G, Iwaï H (2010) Protein trans-splicing and its use in structural biology: opportunities and limitations. Mol Biosys 6:2110–2121
Aranko AS, Volkmann G (2011) Protein trans-splicing as a protein ligation tool to study protein structure and function. Biomol Concepts 2:183–198
Shah NH, Muir TW (2011) Split inteins: nature’s protein ligases. Isr J Chem 51:854–861
Cheriyan M, Perler FB (2009) Protein splicing: a versatile tool for drug discovery. Adv Drug Deliv Rev 61:899–907
Sancheti H, Camarero JA (2009) “Splicing up” drug discovery. Cell-based expression and screening of genetically encoded libraries of backbone-cyclized polypeptides. Adv Drug Deliv Rev 61:908–917
Xu MQ, Perler FB (1996) The mechanism of protein splicing and its modulation by mutation. EMBO J 15:5146–5153
Southworth MW, Benner J, Perler FB (2000) An alternative protein splicing mechanism for inteins lacking an N-terminal nucleophile. EMBO J 19:5019–5026
Saleh L, Southworth MW, Considine N, O’Neill C, Benner J, Bollinger JM Jr, Perler FB (2012) Branched intermediate formation is the slowest step in the protein splicing reaction of the Ala1 KlbA intein from Methanococcus jannaschii. Biochemistry 50:10576–10589
Johnson MA, Southworth MW, Herrmann T, Brace L, Perler FB, Wuthrich K (2007) NMR structure of a KlbA intein precursor from Methanococcus jannaschii. Protein Sci 16:1316–1328
Brace LE, Southworth MW, Tori K, Cushing ML, Perler F (2010) The Deinococcus radiodurans Snf2 intein caught in the act: detection of the class 3 intein signature block F branched intermediate. Protein Sci 19:1525–1533
Reitter JN, Mills KV (2011) Canonical protein splicing of a class one intein that has a class three non-canonical sequence motif. J Bacteriol 193:994–997
Tori K, Perler FB (2011) Expanding the definition of class 3 inteins and their proposed phage origin. J Bacteriol 193:2035–2041
Paulus H (2000) Protein splicing and related forms of protein autoprocessing. Annu Rev Biochem 69:447–496
Johansson DG, Wallin G, Sandberg A, Macao B, Aqvist J, Hard T (2009) Protein autoproteolysis: conformational strain linked to the rate of peptide cleavage by the pH dependence of the N → O acyl shift reaction. J Am Chem Soc 131:9475–9477
Brannigan JA, Dodson G, Duggleby HJ, Moody PC, Smith JL, Tomchick DR, Murzin AG (1995) A protein catalytic framework with an N-terminal nucleophile is capable of self-activation. Nature 378:416–419
Ditzel L, Huber R, Mann K, Heinemeyer W, Wolf DH, Groll M (1998) Conformational constraints for protein self-cleavage in the proteasome. J Mol Biol 279:1187–1191
Kawasaki M, Nogami S, Satow Y, Ohya Y, Anraku Y (1997) Identification of three core regions essential for protein splicing of the yeast Vma1 protozyme. A random mutagenesis study of the entire Vma1-derived endonuclease sequence. J Biol Chem 272:15668–15674
Ghosh I, Sun L, Xu MQ (2001) Zinc inhibition of protein trans-splicing and identification of regions essential for splicing and association of a split intein. J Biol Chem 276:24051–24058
Klabunde T, Sharma S, Telenti A, Jacobs WR Jr, Sacchettini JC (1998) Crystal structure of GyrA intein from Mycobacterium xenopi reveals structural basis of protein splicing. Nat Struct Biol 5:31–36
Poland BW, Xu MQ, Quiocho FA (2000) Structural insights into the protein splicing mechanism of PI-SceI. J Biol Chem 275:16408–16413
Ding Y, Xu MQ, Ghosh I, Chen X, Ferrandon S, Lesage G, Rao Z (2003) Crystal structure of a mini-intein reveals a conserved catalytic module involved in side chain cyclization of asparagine during protein splicing. J Biol Chem 278:39133–39142
Mizutani R, Nogami S, Kawasaki M, Ohya Y, Anraku Y, Satow Y (2002) Protein-splicing reaction via a thiazolidine intermediate: crystal structure of the VMA1-derived endonuclease bearing the N and C-terminal propeptides. J Mol Biol 316:919–929
Sun P, Ye S, Ferrandon S, Evans TC, Xu MQ, Rao Z (2005) Crystal structures of an intein from the split dnaE gene of Synechocystis sp. PCC6803 reveal the catalytic model without the penultimate histidine and the mechanism of zinc ion inhibition of protein splicing. J Mol Biol 353:1093–1105
Van Roey P, Pereira B, Li Z, Hiraga K, Belfort M, Derbyshire V (2007) Crystallographic and mutational studies of Mycobacterium tuberculosis recA mini-inteins suggest a pivotal role for a highly conserved aspartate residue. J Mol Biol 367:162–173
Du Z, Shemella PT, Liu Y, McCallum SA, Pereira B, Nayak SK, Belfort G, Belfort M, Wang C (2009) Highly conserved histidine plays a dual catalytic role in protein splicing: a pKa shift mechanism. J Am Chem Soc 131:11581–11589
Romanelli A, Shekhtman A, Cowburn D, Muir TW (2004) Semisynthesis of a segmental isotopically labeled protein splicing precursor: NMR evidence for an unusual peptide bond at the N-extein–intein junction. Proc Natl Acad Sci USA 101:6397–6402
Pearl EJ, Tyndall JD, Poulter RT, Wilbanks SM (2007) Sequence requirements for splicing by the Cne PRP8 intein. FEBS Lett 581:3000–3004
Du Z, Liu J, Albracht CD, Hsu A, Chen W, Marieni MD, Colelli KM, Williams JE, Reitter JN, Mills KV, Wang C (2011) Structural and mutational studies of a hyperthermophilic intein from DNA polymerase II of Pyrococcus abyssi. J Biol Chem 286:38638–38648
Pietrokovski S (1998) Modular organization of inteins and C-terminal autocatalytic domains. Protein Sci 7:64–71
Tori K, Cheriyan M, Pedamallu CS, Contreras MA, Perler FB (2012) The Thermococcus kodakaraensis Tko CDC21-1 intein activates its N-terminal splice junction in the absence of a conserved histidine by a compensatory mechanism. Biochemistry 51:2496–2505
Du Z, Zheng Y, Patterson M, Liu Y, Wang C (2011) pK(a) coupling at the intein active site: implications for the coordination mechanism of protein splicing with a conserved aspartate. J Am Chem Soc 133:10275–10282
Schwarzer D, Ludwig C, Thiel IV, Mootz HD (2012) Probing intein-catalyzed thioester formation by unnatural amino acid substitutions in the active site. Biochemistry 51:233–242
Appleby JH, Zhou K, Volkmann G, Liu XQ (2009) Novel Split Intein for trans-splicing synthetic peptide onto C-terminus of protein. J Biol Chem 284:6194–6199
Volkmann G, Liu XQ (2011) Intein lacking conserved C-terminal motif G retains controllable N-cleavage activity. FEBS J 278:3431–3446
Ludwig C, Schwarzer D, Mootz HD (2008) Interaction studies and alanine scanning analysis of a semi-synthetic split intein reveal thiazoline ring formation from an intermediate of the protein splicing reaction. J Biol Chem 283:25264–25272
Kang J, Richardson JP, Macmillan D (2009) 3-Mercaptopropionic acid-mediated synthesis of peptide and protein thioesters. Chem Commun (Camb) 407–409
Kang J, Macmillan D (2010) Peptide and protein thioester synthesis via N → S acyl transfer. Org Biomol Chem 8:1993–2002
Kawakami T, Aimoto S (2007) Sequential peptide ligation by using a controlled cysteinyl prolyl ester (CPE) autoactivating unit. Tetrahedron Lett 48:1903–1905
Pereira B, Shemella PT, Amitai G, Belfort G, Nayak SK, Belfort M (2011) Spontaneous proton transfer to a conserved intein residue determines on-pathway protein splicing. J Mol Biol 406:430–442
Chong S, Williams KS, Wotkowicz C, Xu MQ (1998) Modulation of protein splicing of the Saccharomyces cerevisiae vacuolar membrane ATPase intein. J Biol Chem 273:10567–10577
Martin DD, Xu MQ, Evans TC Jr (2001) Characterization of a naturally occurring trans-splicing intein from Synechocystis sp. PCC6803. Biochemistry 40:1393–1402
Zettler J, Schutz V, Mootz HD (2009) The naturally split Npu DnaE intein exhibits an extraordinarily high rate in the protein trans-splicing reaction. FEBS Lett 583:909–914
Frutos S, Goger M, Giovani B, Cowburn D, Muir TW (2010) Branched intermediate formation stimulates peptide bond cleavage in protein splicing. Nat Chem Biol 6:527–533
Xu MQ, Comb DG, Paulus H, Noren CJ, Shao Y, Perler FB (1994) Protein splicing: an analysis of the branched intermediate and its resolution by succinimide formation. EMBO J 13:5517–5522
Shao Y, Xu MQ, Paulus H (1995) Protein splicing: characterization of the aminosuccinimide residue at the carboxyl terminus of the excised intervening sequence. Biochemistry 34:10844–10850
Stephenson RC, Clarke S (1989) Succinimide formation from aspartyl and asparaginyl peptides as a model for the spontaneous degradation of proteins. J Biol Chem 264:6164–6170
Shemella P, Pereira B, Zhang Y, Van Roey P, Belfort G, Garde S, Nayak SK (2007) Mechanism for intein C-terminal cleavage: a proposal from quantum mechanical calculations. Biophys J 92:847–853
Wood DW, Wu W, Belfort G, Derbyshire V, Belfort M (1999) A genetic system yields self-cleaving inteins for bioseparations. Nat Biotechnol 17:889–892
Mathys S, Evans TC, Chute IC, Wu H, Chong S, Benner J, Liu XQ, Xu MQ (1999) Characterization of a self-splicing mini-intein and its conversion into autocatalytic N- and C-terminal cleavage elements: facile production of protein building blocks for protein ligation. Gene 231:1–13
Wood DW, Derbyshire V, Wu W, Chartrain M, Belfort M, Belfort G (2000) Optimized single-step affinity purification with a self-cleaving intein applied to human acidic fibroblast growth factor. Biotechnol Prog 16:1055–1063
Mujika JI, Lopez X, Mulholland AJ (2009) Modeling protein splicing: reaction pathway for C-terminal splice and intein scission. J Phys Chem B 113:5607–5616
Kurpiers T, Mootz HD (2008) Site-specific chemical modification of proteins with a prelabelled cysteine tag using the artificially split Mxe GyrA intein. ChemBioChem 9:2317–2325
Shao Y, Paulus H (1997) Protein splicing: estimation of the rate of O–N and S–N acyl rearrangements, the last step of the splicing process. J Pept Res 50:193–198
Amitai G, Callahan BP, Stanger MJ, Belfort G, Belfort M (2009) Modulation of intein activity by its neighboring extein substrates. Proc Natl Acad Sci USA 106:11005–11010
Ellila S, Jurvansuu JM, Iwai H (2011) Evaluation and comparison of protein splicing by exogenous inteins with foreign exteins in Escherichia coli. FEBS Lett 585:3471–3477
Shah NH, Dann GP, Vila-Perello M, Liu Z, Muir TW (2012) Ultrafast protein splicing is common among cyanobacterial split inteins: implications for protein engineering. J Am Chem Soc 134(28):11338–11341
Øemig JS, Zhou D, Kajander T, Wlodawer A, Iwai H (2012) NMR and crystal structures of the Pyrococcus horikoshii RadA intein guide a strategy for engineering a highly efficient and promiscuous intein. J Mol Biol 421(1):85–99
Adam E, Perler FB (2002) Development of a positive genetic selection system for inhibition of protein splicing using mycobacterial inteins in Escherichia coli DNA gyrase subunit A. J Mol Microbiol Biotechnol 4:479–487
Cann IK, Amaya KR, Southworth MW, Perler FB (2004) Bacteriophage-based genetic system for selection of nonsplicing inteins. Appl Environ Microbiol 70:3158–3162
Zeidler MP, Tan C, Bellaiche Y, Cherry S, Hader S, Gayko U, Perrimon N (2004) Temperature-sensitive control of protein activity by conditionally splicing inteins. Nat Biotechnol 22:871–876
Tan G, Chen M, Foote C, Tan C (2009) Temperature-sensitive mutations made easy: generating conditional mutations by using temperature-sensitive inteins that function within different temperature ranges. Genetics 183:13–22
Hiraga K, Soga I, Dansereau JT, Pereira B, Derbyshire V, Du Z, Wang C, Van Roey P, Belfort G, Belfort M (2009) Selection and structure of hyperactive inteins: peripheral changes relayed to the catalytic center. J Mol Biol 393:1106–1117
Hiraga K, Derbyshire V, Dansereau JT, Van Roey P, Belfort M (2005) Minimization and stabilization of the Mycobacterium tuberculosis recA intein. J Mol Biol 354:916–926
Lockless SW, Muir TW (2009) Traceless protein splicing utilizing evolved split inteins. Proc Natl Acad Sci USA 106:10999–11004
Buskirk AR, Ong YC, Gartner ZJ, Liu DR (2004) Directed evolution of ligand dependence: small-molecule-activated protein splicing. Proc Natl Acad Sci USA 101:10505–10510
Wu H, Xu MQ, Liu XQ (1998) Protein trans-splicing and functional mini-inteins of a cyanobacterial dnaB intein. Biochim Biophys Acta 1387:422–432
Appleby-Tagoe JH, Thiel IV, Wang Y, Wang Y, Mootz HD, Liu XQ (2011) Highly efficient and more general cis- and trans-splicing inteins through sequential directed evolution. J Biol Chem 286:34440–34447
Du Z, Liu Y, Ban D, Lopez MM, Belfort M, Wang C (2010) Backbone dynamics and global effects of an activating mutation in minimized Mtu RecA inteins. J Mol Biol 400:755–767
Caspi J, Amitai G, Belenkiy O, Pietrokovski S (2003) Distribution of split DnaE inteins in cyanobacteria. Mol Microbiol 50:1569–1577
Iwai H, Züger S, Jin J, Tam PH (2006) Highly efficient protein trans-splicing by a naturally split DnaE intein from Nostoc punctiforme. FEBS Lett 580:1853–1858
Dassa B, Amitai G, Caspi J, Schueler-Furman O, Pietrokovski S (2007) Trans protein splicing of cyanobacterial split inteins in endogenous and exogenous combinations. Biochemistry 46:322–330
Peck SH, Chen I, Liu DR (2011) Directed evolution of a small-molecule-triggered intein with improved splicing properties in mammalian cells. Chem Biol 18:619–630
Skretas G, Wood DW (2005) Regulation of protein activity with small-molecule-controlled inteins. Protein Sci 14:523–532
Muir TW, Sondhi D, Cole PA (1998) Expressed protein ligation: a general method for protein engineering. Proc Natl Acad Sci USA 95:6705–6710
Muir TW (2003) Semisynthesis of proteins by expressed protein ligation. Annu Rev Biochem 72:249–289
Evans TC Jr, Benner J, Xu MQ (1998) Semisynthesis of cytotoxic proteins using a modified protein splicing element. Protein Sci 7:2256–2264
Xu MQ, Evans TC Jr (2003) Purification of recombinant proteins from E. coli by engineered inteins. Methods Mol Biol 205:43–68
Muralidharan V, Muir TW (2006) Protein ligation: an enabling technology for the biophysical analysis of proteins. Nat Methods 3:429–438
Shi J, Muir TW (2005) Development of a tandem protein trans-splicing system based on native and engineered split inteins. J Am Chem Soc 127:6198–6206
Lu W, Sun Z, Tang Y, Chen J, Tang F, Zhang J, Liu JN (2011) Split intein facilitated tag affinity purification for recombinant proteins with controllable tag removal by inducible auto-cleavage. J Chromatogr A 1218:2553–2560
Kurpiers T, Mootz HD (2007) Regioselective cysteine bioconjugation by appending a labeled cystein tag to a protein by using protein splicing in trans. Angew Chem Int Ed Engl 46:5234–5237
Brenzel S, Cebi M, Reiss P, Koert U, Mootz HD (2009) Expanding the scope of protein trans-splicing to fragment ligation of an integral membrane protein: towards modulation of porin-based ion channels by chemical modification. ChemBioChem 10:983–986
Ludwig C, Pfeiff M, Linne U, Mootz HD (2006) Ligation of a synthetic peptide to the N-terminus of a recombinant protein using semisynthetic protein trans-splicing. Angew Chem Int Ed Engl 45:5218–5221
Volkmann G, Liu XQ (2009) Protein C-terminal labeling and biotinylation using synthetic peptide and split-intein. PLoS ONE 4:e8381
Yang JY, Yang WY (2009) Site-specific two-color protein labeling for FRET studies using split inteins. J Am Chem Soc 131:11644–11645
Ando T, Tsukiji S, Tanaka T, Nagamune T (2007) Construction of a small-molecule-integrated semisynthetic split intein for in vivo protein ligation. Chem Commun (Camb) 4995–4997
Charalambous A, Andreou M, Skourides PA (2009) Intein-mediated site-specific conjugation of quantum dots to proteins in vivo. J Nanobiotechnol 7:9
Olschewski D, Seidel R, Miesbauer M, Rambold AS, Oesterhelt D, Winklhofer KF, Tatzelt J, Engelhard M, Becker CF (2007) Semisynthetic murine prion protein equipped with a GPI anchor mimic incorporates into cellular membranes. Chem Biol 14:994–1006
Chu NK, Olschewski D, Seidel R, Winklhofer KF, Tatzelt J, Engelhard M, Becker CF (2010) Protein immobilization on liposomes and lipid-coated nanoparticles by protein trans-splicing. J Pept Sci 16:582–588
Kwon Y, Coleman MA, Camarero JA (2006) Selective immobilization of proteins onto solid supports through split-intein-mediated protein trans-splicing. Angew Chem Int Ed Engl 45:1726–1729
Lew BM, Mills KV, Paulus H (1999) Characteristics of protein splicing in trans-mediated by a semisynthetic split intein. Biopolymers 51:355–362
Evans TC Jr, Martin D, Kolly R, Panne D, Sun L, Ghosh I, Chen L, Benner J, Liu XQ, Xu MQ (2000) Protein trans-splicing and cyclization by a naturally split intein from the dnaE gene of Synechocystis species PCC6803. J Biol Chem 275:9091–9094
Øemig JS, Aranko AS, Djupsjöbacka J, Heinämäki K, Iwai H (2009) Solution structure of DnaE intein from Nostoc punctiforme: structural basis for the design of a new split intein suitable for site-specific chemical modification. FEBS Lett 583:1451–1456
Aranko AS, Züger S, Buchinger E, Iwai H (2009) In vivo and in vitro protein ligation by naturally occurring and engineered split DnaE inteins. PLoS ONE 4:e5185
Giriat I, Muir TW (2003) Protein semi-synthesis in living cells. J Am Chem Soc 125:7180–7181
Borra R, Dong D, Elnagar AY, Woldemariam GA, Camarero JA (2012) In-cell fluorescence activation and labeling of proteins mediated by FRET-quenched split inteins. J Am Chem Soc 134:6344–6353
Liu CC, Schultz PG (2010) Adding new chemistries to the genetic code. Annu Rev Biochem 79:413–444
Kanno A, Ozawa T, Umezawa Y (2009) Bioluminescent imaging of MAPK function with intein-mediated reporter gene assay. Methods Mol Biol 574:185–192
Kanno A, Umezawa Y, Ozawa T (2009) Detection of apoptosis using cyclic luciferase in living mammals. Methods Mol Biol 574:105–114
Zhang Y, Yang W, Chen L, Shi Y, Li G, Zhou N (2011) Development of a novel DnaE intein-based assay for quantitative analysis of G-protein-coupled receptor internalization. Anal Biochem 417:65–72
Wong SS, Kotera I, Mills E, Suzuki H, Truong K (2012) Split-intein-mediated re-assembly of genetically encoded Ca(2+) indicators. Cell Calcium 51:57–64
Gils M, Marillonnet S, Werner S, Grutzner R, Giritch A, Engler C, Schachschneider R, Klimyuk V, Gleba Y (2008) A novel hybrid seed system for plants. Plant Biotechnol J 6:226–235
Kempe K, Rubtsova M, Gils M (2009) Intein-mediated protein assembly in transgenic wheat: production of active barnase and acetolactate synthase from split genes. Plant Biotechnol J 7:283–297
Chin HG, Kim GD, Marin I, Mersha F, Evans TC Jr, Chen L, Xu MQ, Pradhan S (2003) Protein trans-splicing in transgenic plant chloroplast: reconstruction of herbicide resistance from split genes. Proc Natl Acad Sci USA 100:4510–4515
Yuen CM, Rodda SJ, Vokes SA, McMahon AP, Liu DR (2006) Control of transcription factor activity and osteoblast differentiation in mammalian cells using an evolved small-molecule-dependent intein. J Am Chem Soc 128:8939–8946
Mootz HD, Muir TW (2002) Protein splicing triggered by a small molecule. J Am Chem Soc 124:9044–9045
Mootz HD, Blum ES, Tyszkiewicz AB, Muir TW (2003) Conditional protein splicing: a new tool to control protein structure and function in vitro and in vivo. J Am Chem Soc 125:10561–10569
Mootz HD, Blum ES, Muir TW (2004) Activation of an autoregulated protein kinase by conditional protein splicing. Angew Chem Int Ed Engl 43:5189–5192
Schwartz EC, Saez L, Young MW, Muir TW (2007) Post-translational enzyme activation in an animal via optimized conditional protein splicing. Nat Chem Biol 3:50–54
Tyszkiewicz AB, Muir TW (2008) Activation of protein splicing with light in yeast. Nat Methods 5:303–305
Sonntag T, Mootz HD (2011) An intein-cassette integration approach used for the generation of a split TEV protease activated by conditional protein splicing. Mol BioSyst 7:2031–2039
Berrade L, Kwon Y, Camarero JA (2010) Photomodulation of protein trans-splicing through backbone photocaging of the DnaE split intein. Chem Bio Chem 11:1368–1372
Vila-Perello M, Hori Y, Ribo M, Muir TW (2008) Activation of protein splicing by protease- or light-triggered O to N acyl migration. Angew Chem Int Ed Engl 47:7764–7767
Binschik J, Zettler J, Mootz HD (2011) Photocontrol of protein activity mediated by the cleavage reaction of a split intein. Angew Chem Int Ed Engl 50:3249–3252
Otomo T, Ito N, Kyogoku Y, Yamazaki T (1999) NMR observation of selected segments in a larger protein: central-segment isotope labeling through intein-mediated ligation. Biochemistry 38:16040–16044
Brenzel S, Kurpiers T, Mootz HD (2006) Engineering artificially split inteins for applications in protein chemistry: biochemical characterization of the split Ssp DnaB intein and comparison to the split Sce VMA intein. Biochemistry 45:1571–1578
Busche AE, Aranko AS, Talebzadeh-Farooji M, Bernhard F, Dötsch V, Iwai H (2009) Segmental isotopic labeling of a central domain in a multidomain protein by protein trans-splicing using only one robust DnaE intein. Angew Chem Int Ed Engl 48:6128–6131
Shah NH, Vila-Perello M, Muir TW (2011) Kinetic control of one-pot trans-splicing reactions by using a wild-type and designed split intein. Angew Chem Int Ed Engl 50:6511–6515
Callahan BP, Topilina NI, Stanger MJ, Van Roey P, Belfort M (2011) Structure of catalytically competent intein caught in a redox trap with functional and evolutionary implications. Nat Struct Mol Biol 18:630–633
Perler FB (2005) Protein splicing mechanisms and applications. IUBMB Life 57:469–476
Mills KV, Dorval DM, Lewandowski KT (2005) Kinetic analysis of the individual steps of protein splicing for the Pyrococcus abyssi PolII intein. J Biol Chem 280:2714–2720
Saleh L, Perler FB (2006) Protein splicing in cis and in trans. Chem Rec 6:183–193
Acknowledgments
We apologize to those researchers whose work could not be covered in detail due to space limitations and the special focus of this work. We thank all coworkers, past and present, for their contributions to the group’s research. Funding in the Mootz lab was provided by the DFG (grant DFG MO 1073/3-1) and the HFSP (Grant RGP0031/2010).
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Volkmann, G., Mootz, H.D. Recent progress in intein research: from mechanism to directed evolution and applications. Cell. Mol. Life Sci. 70, 1185–1206 (2013). https://doi.org/10.1007/s00018-012-1120-4
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DOI: https://doi.org/10.1007/s00018-012-1120-4