Title : Mutations in the GTP-binding site of GS alpha alter stimulation of adenylyl cyclase.

Pub. Date : 1989 Sep 15

PMID : 2549064






4 Functional Relationships(s)
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Protein Name
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1 Mutational replacements of specific residues in the GTP-binding pocket of the 21-kDa ras proteins (p21ras) reduce their GTPase activity. Guanosine Triphosphate Harvey rat sarcoma virus oncogene Mus musculus
2 alpha s in which leucine replaces glutamine 227 (corresponding to glutamine 61 of p21ras) constitutively activates adenylyl cyclase and reduces the kcat for GTP hydrolysis more than 100-fold. Guanosine Triphosphate Harvey rat sarcoma virus oncogene Mus musculus
3 We conclude that alpha s residues near glutamine 227 and glycine 49 participate in binding and hydrolysis of GTP, although the GTP binding regions of alpha s and p21ras are not identical. Guanosine Triphosphate Harvey rat sarcoma virus oncogene Mus musculus
4 We conclude that alpha s residues near glutamine 227 and glycine 49 participate in binding and hydrolysis of GTP, although the GTP binding regions of alpha s and p21ras are not identical. Guanosine Triphosphate Harvey rat sarcoma virus oncogene Mus musculus