Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
ISSN-L : 0918-6158
Regular Articles
Post-Translational Modification of βH-Crystallin of Bovine Lens with Aging
Akira KameiNoriko TakeuchiMakoto NagaiSatoshi Mori
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2003 Volume 26 Issue 12 Pages 1715-1720


This study investigates post-translational modification of proteins of bovine lens with aging (3 year old vs. 6 month old cows). After water-soluble proteins were submitted to gel and ion exchange chromatography, βH-crystallin, a subunit of β-crystallin, and modified materials were isolated. These materials were then submitted to two dimensional polyacrylamide gel electrophoresis (2D-SDS PAGE) to detect and isolate the new spots. Results for lens proteins from 3 year old animals were compared to those from 6 month old animals. All spots were digested in gel with trypsin and the molecular masses of tryptic digests were measured by matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOFMS). Peptides peaks obtained from mass mapping were identified using the protein database of the MS-Fit program in the Protein prospector program of the University of California, San Francisco. We found that two post translational modifications of βH-crystallin, acetylation and phosphorylation occurred with aging.

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© 2003 The Pharmaceutical Society of Japan
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