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Domain Architecture Based Methods for Comparative Functional Genomics Toward Therapeutic Drug Target Discovery

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Abstract

Genes duplicate, mutate, recombine, fuse or fission to produce new genes, or when genes are formed from de novo, novel functions arise during evolution. Researchers have tried to quantify the causes of these molecular diversification processes to know how these genes increase molecular complexity over a period of time, for instance protein domain organization. In contrast to global sequence similarity, protein domain architectures can capture key structural and functional characteristics, making them better proxies for describing functional equivalence. In Prokaryotes and eukaryotes it has proven that, domain designs are retained over significant evolutionary distances. Protein domain architectures are now being utilized to categorize and distinguish evolutionarily related proteins and find homologs among species that are evolutionarily distant from one another. Additionally, structural information stored in domain structures has accelerated homology identification and sequence search methods. Tools for functional protein annotation have been developed to discover, protein domain content, domain order, domain recurrence, and domain position as all these contribute to the prediction of protein functional accuracy. In this review, an attempt is made to summarise facts and speculations regarding the use of protein domain architecture and modularity to identify possible therapeutic targets among cellular activities based on the understanding their linked biological processes.

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Abbreviations

PDA:

Protein domain architecture

DCN:

Protein domain co-occurrence networks

SCOP:

Structural classification of proteins

CATH:

Protein structural classification database; class (C), architecture (A), topology (T) and homologous superfamily (H)

Pfam:

The protein families database ProDoM

EGF:

Epidermal growth factor

CUB domain:

Complement protein subcomponents C1r/C1s, urchin embryonic growth factor, and bone morphogenetic protein 1

HSP:

Heat shock protein

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Acknowledgements

We thank Dr. Riaz Mahmood, Professor, Department of Biotechnology, Kuvempu University, Shankaraghatta, India, for assisting in language editing.

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No funding was available for the present work.

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Correspondence to Hulikal Shivashankara Santosh Kumar.

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The author declares no conflict of interest.

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Handling editor: Erich Bornberg-Bauer.

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Gollapalli, P., Rudrappa, S., Kumar, V. et al. Domain Architecture Based Methods for Comparative Functional Genomics Toward Therapeutic Drug Target Discovery. J Mol Evol 91, 598–615 (2023). https://doi.org/10.1007/s00239-023-10129-w

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  • DOI: https://doi.org/10.1007/s00239-023-10129-w

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