Abstract
The class I of the high mobility group (HMG) proteins is formed by phosphoproteins which are associated with AT‐rich DNA sequences in the nucleus. Three HMGI proteins have previously been described in proliferating rodent cells (HMG Y, HMG I and HMGI‐C). All three proteins exhibit microheterogeneity. The microheterogeneity of mouse HMG Y has been investigated in detail and shown to be due to phosphorylation of the protein which is sensitive to alkaline‐phosphatase treatment. HMG I is similarly modified. Human cells have up to now only been found to contain HMG Y and HMG I. A search for the third protein, HMGI‐C, in human cells was carried out and the protein was found in a hepatoma cell line, but not in normal or transformed T‐cells. This HMGI‐C protein was found to be modified by phosphorylation, part of which was found to be phosphatase insensitive. An unexpected additional finding in this study was that human cells contain two HMG17 proteins which differ in their N‐terminal primary sequences.
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Dates
Type | When |
---|---|
Created | 20 years, 5 months ago (March 3, 2005, 11:56 p.m.) |
Deposited | 1 year, 9 months ago (Oct. 31, 2023, 6:11 a.m.) |
Indexed | 1 month, 2 weeks ago (July 11, 2025, 6:45 a.m.) |
Issued | 34 years, 3 months ago (May 1, 1991) |
Published | 34 years, 3 months ago (May 1, 1991) |
Published Online | 20 years, 5 months ago (March 3, 2005) |
Published Print | 34 years, 3 months ago (May 1, 1991) |
@article{GIANCOTTI_1991, title={Comparison of multiple forms of the high mobility group I proteins in rodent and human cells: Identification of the human high mobility group I‐C protein}, volume={198}, ISSN={1432-1033}, url={http://dx.doi.org/10.1111/j.1432-1033.1991.tb16003.x}, DOI={10.1111/j.1432-1033.1991.tb16003.x}, number={1}, journal={European Journal of Biochemistry}, publisher={Wiley}, author={GIANCOTTI, Vincenzo and BANDIERA, Antonella and BURATTI, Emanuele and FUSCO, Alfredo and MARZARI, Roberto and COLES, Brian and GOODWIN, Graham H.}, year={1991}, month=may, pages={211–216} }