Title : Haemoglobin inhibits GTP-hydrolysis and GDP/GTP-exchange activities of a low M(r) GTP-binding protein, ras p21.

Pub. Date : 1994 Dec

PMID : 7819095






4 Functional Relationships(s)
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1 Haemoglobin inhibits GTP-hydrolysis and GDP/GTP-exchange activities of a low M(r) GTP-binding protein, ras p21. Guanosine Diphosphate H3 histone pseudogene 16 Homo sapiens
2 Haemoglobin was observed to inhibit the GDP/GTP-exchange activity of ras protein (ras p21) by measurement of [3H]GDP-dissociation activity in time- and dose-dependent manners. Guanosine Diphosphate H3 histone pseudogene 16 Homo sapiens
3 Methaemoglobin also inhibited both [3H]GDP-dissociation and [32P]GTP-hydrolysis activities of ras p21 in a very similar manner to that by haemoglobin. Guanosine Diphosphate H3 histone pseudogene 16 Homo sapiens
4 The obtained results strongly suggest that haemoglobin suppresses the physiological function(s) of ras p21 in vivo inhibiting both [32P]GTP-hydrolysis and GDP/GTP-dissociation of ras p21 in erythrocytes. Guanosine Diphosphate H3 histone pseudogene 16 Homo sapiens