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Protein Families

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Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key...

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Identification of Nucleolar Factors During HIV-1 Replication Through Rev Immunoprecipitation and Mass Spectrometry

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The Alba protein family: Structure and function.

Manish Goyal¹, Chinmoy Banerjee¹, Shiladitya Nag¹

¹Division of Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata, West Bengal 700032, India.

Biochimica Et Biophysica Acta

|February 23, 2016

Summary

This summary is machine-generated.

Alba proteins are versatile nucleic acid binders found in archaea and eukaryotes. These proteins, regulated by acetylation, play crucial roles in genome organization, gene regulation, and RNA metabolism across diverse organisms.

Keywords:

Acetylation Alba Chromatin Nucleic acid binding Posttranslational modification Sir2

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Area of Science:

Biochemistry
Molecular Biology
Genetics

Background:

Alba family proteins are small, basic, dimeric nucleic acid-binding proteins conserved in archaea and eukaryotes.
They are characterized by acetylation/deacetylation-mediated regulation, influencing their DNA binding affinity.
Initially identified as chromosomal proteins involved in chromatin structure and transcription repression.

Purpose of the Study:

To provide a comprehensive overview of Alba family proteins.
To highlight their salient features and diverse functional roles.
To emphasize their significance in various organisms.

Main Methods:

Literature review of existing studies on Alba family proteins.
Analysis of biochemical properties and functional data.
Synthesis of information on their distribution and roles across different life forms.

Main Results:

Alba proteins exhibit cooperative DNA binding without sequence specificity and interact with RNA and ribonucleoprotein complexes.
Recent evidence reveals functional plasticity, including roles in genome packaging, transcriptional/translational regulation, RNA metabolism, and development.
Factors like multiple copies, functional crosstalk, differential binding, and posttranslational modifications regulate Alba protein functions.

Conclusions:

Alba family proteins are key players with diverse functions beyond initial chromatin roles.
Their functional plasticity and regulatory mechanisms contribute to their widespread importance.
Further research into Alba proteins is warranted due to their broad biological relevance.