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[Equine pepsins]

V M Stepanov, G I Lavrenova, G N Rudenskaia

    Biokhimiia (Moscow, Russia)
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Six equine pepsin forms were analyzed, revealing high similarity in their N-terminal amino acid sequences. These horse pepsin components exhibit greater sequence homology than human pepsin and gastricsin isoenzymes.

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    Area of Science:

    • Biochemistry
    • Proteomics
    • Enzymology

    Context:

    • Gastric juice contains multiple pepsin isoenzymes.
    • Understanding pepsin heterogeneity is crucial for digestive physiology.
    • Comparative analysis of animal pepsin sequences provides evolutionary insights.

    Purpose:

    • To determine the amino acid sequence of the N-terminal region of equine pepsin components.
    • To compare the sequence similarity among different equine pepsin isoenzymes.
    • To contrast the sequence homology of equine pepsins with human counterparts.

    Summary:

    • Six equine pepsin forms were identified in horse gastric juice.
    • The N-terminal amino acid sequences of major equine pepsin components were elucidated.
    • Equine pepsins with pI 2.1 and 2.3 share identical sequences for at least 31 residues.

    Related Experiment Videos

  • A component with pI 2.6 showed sequence identity for the first 10 residues.
  • Equine pepsin with pI 3.2 exhibited 3 substitutions over 33 amino acids compared to pepsins with pI 2.1 and 2.3.
  • These equine pepsin forms demonstrated higher similarity than human pepsin and gastricsin.

    • Impact:

    • Provides detailed molecular characterization of equine pepsin.
    • Highlights significant sequence conservation within equine pepsin isoenzymes.
    • Offers a comparative benchmark for studying pepsin evolution and function across species.