Skip to main content
Log in

Residues 377-389 from the δ subunit ofTorpedo californica acetylcholine receptor are located in the cytoplasmic surface

  • Published:
Journal of Protein Chemistry Aims and scope Submit manuscript

Abstract

Torpedo californica acetylcholine receptor (AcChR) enriched, sealed vesicles have been specifically labeled on the cytoplasmic surface with pyridoxal 5′-phosphate (Perez-Ramirez, B., and Martinez-Carrion, M., 1989,Biochemistry 28, 5034–5040). After chromatography of the peptide fragments produced by tryptin digestion of labeled AcChR, several fractions containing the phosphopyridoxyl label were obtained. Edman degradation identified one of the fractions, with sequence SRSELMFEKQSER, as corresponding to residues 377–389 in theδ subunit (primary structure). The latter must be a cytoplasmic region of this transmembranous protein, and residueδK385 must reside in a water-soluble exposed domain of the cytosolic side of the membrane. Introduction of phosphopyridoxyl residues allows for their potential use as probes of conformational changes in the cytosolic surface of the receptor molecule.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

Abbreviations

AcChR:

acetylcholine receptor

PLP:

pyridoxal 5′-phosphate

PNP:

pyridoxine 5′-phosphate

α-Bgt:

α-bungarotoxin

OG:

Β-D-octylglucopyranoside

TPCK:

N-tosyl-L-phenylalanine chloromethyl ketone

TFA:

trifluoroacetic acid

HPLC:

high-performance liquid chromatography

RP-HPLC:

reversed-phase high-performance liquid chromatography

HEPES:

N-[2-hydroxyethyl]piperazine-N′-[2-ethanesulfonic acid]

PBS:

10 mM sodium phosphate, pH 7.5, 100 mM NaCl

SDS-PAGE:

sodium dodecyl sulfate polyacrylamide gel electrophoresis

PTH:

phenylthiohydantoin

References

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Perez-Ramirez, B., Iriarte, A. & Martinez-Carrion, M. Residues 377-389 from the δ subunit ofTorpedo californica acetylcholine receptor are located in the cytoplasmic surface. J Protein Chem 13, 67–76 (1994). https://doi.org/10.1007/BF01891994

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01891994

Key words

Navigation