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Short Linear Motifs Orchestrate Functioning of Human Proteins during Embryonic Development, Redox Regulation, and

Susanna S Sologova1, Sergey P Zavadskiy1, Innokenty M Mokhosoev2

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Short linear motifs (SLiMs) found in human alpha-fetoprotein (AFP) are present in diverse non-homologous proteins. These conserved SLiMs regulate key cellular processes including embryonic development and cancer progression.

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Area of Science:

  • Proteomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Short linear motifs (SLiMs) are conserved functional protein modules.
  • Human alpha-fetoprotein (AFP) contains two experimentally validated SLiMs: AFP$_{14-20}$ and GIP-9.
  • These SLiMs are implicated in embryonic development and cancer.

Purpose of the Study:

  • To identify human proteins containing SLiMs similar to those in AFP.
  • To functionally categorize these proteins using Gene Ontology (GO) and pathway analysis.
  • To explore the broader roles of these conserved SLiMs in cellular functions.

Main Methods:

  • Searched the UniprotKB database for human proteins with AFP-like SLiMs.
  • Performed GO-based functional categorization and gene set enrichment analysis.
  • Included analysis of biological processes, molecular functions, and pathways (KEGG).

Main Results:

  • Identified AFP-like SLiMs in various non-homologous proteins.
  • These proteins are involved in embryonic development, cancer, and redox homeostasis.
  • Enriched GO terms related to cell proliferation, differentiation, DNA repair, and immune response.

Conclusions:

  • Conserved SLiMs are functionally integrated into diverse proteins.
  • These SLiMs act as building blocks for coordinated protein function.
  • SLiMs contribute to fundamental cellular processes beyond their original context.