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Myelin basic protein-specific protein methylase I activity in shiverer mutant mouse brain

✍ Scribed by S. Kim; M. Tuck; L.-L. Ho; A.T. Campagnoni; E. Barbarese; R.L. Knobler; F.D. Lublin; L.P. Chanderkar; W.K. Paik

Publisher: John Wiley and Sons
Year: 1986
Tongue: English
Weight: 546 KB
Volume: 16
Category: Article
ISSN: 0360-4012
DOI: 10.1002/jnr.490160203

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✦ Synopsis

Myelin basic protein (MBP)-specific protein-arginine N-methyltransferase (protein methylase I) activity in homozygous shiverer (shilshi) mutant mouse brain is significantly higher than in the normal littermate brain at the onset of myelination. While the enzyme activity (expressed as pmol of S-adenosyl-L-[methyZ-''C]methionine used/min/mg enzyme protein) increases coincidently during the period of myelination in the normal brain (15-18 days of age), it decreases significantly in the mutant brain during this period of time. These results are in contrast to those found with another dysmyelinating mutant, jimpy (ip/Y) mice, in which the enzyme activity in the mutant brains is similar to that in the normal animals but remains unchanged during the myelination process. There is no difference in the weight and protein concentration of the normal and shiverer mutant brains with corresponding ages, and the histone-specific protein methylase I activity is also unaffected in the shiverer brain.

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