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Related Experiment Videos

Age-dependent covalent changes in MP18 from bovine lens membrane.

G Subramanian1, L Takemoto

  • 1Division of Biology, Kansas State University, Manhattan 66506.

Investigative Ophthalmology & Visual Science
|August 1, 1991
PubMed
Summary

Aging causes covalent changes in the bovine lens MP18 protein. Researchers found MP18 protein levels decrease with age, with significant differences observed in newborn versus adult bovine lenses.

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Area of Science:

  • Ophthalmology
  • Biochemistry
  • Molecular Biology

Background:

  • The MP18 molecule is an 18-kilodalton protein found in bovine lens membranes.
  • Understanding age-related changes in lens proteins is crucial for comprehending lens aging and potential pathologies.

Purpose of the Study:

  • To confirm the sequence of the MP18 protein.
  • To investigate age-related modifications of the MP18 molecule in bovine lenses.

Main Methods:

  • Peptide antisera were generated against specific sequences of the MP18 protein.
  • Western blot analysis was performed on membrane fractions from newborn and adult bovine lenses using these antisera.
  • Quantitative analysis of antibody binding ratios was conducted.

Main Results:

  • All three antisera recognized the MP18 protein, with stronger reactivity in newborn lens membranes compared to adult.
  • Statistically significant differences in binding ratios were observed between newborn and adult lens cortex, and between cortex and nucleus in newborn lenses.
  • One antiserum (anti-113) failed to detect MP18 in adult lens membrane preparations, indicating substantial age-related changes.

Conclusions:

  • The study confirms the putative MP18 sequence.
  • Covalent modifications of the MP18 molecule occur during the aging process in the bovine lens.
  • These findings contribute to understanding molecular changes associated with lens aging.

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