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Distribution of G/sub o. cap alpha. / mRNA and protein in bovine tissues

Conference · · Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States)
OSTI ID:6126193
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G/sub o..cap alpha../ is a 39 kDa guanyl nucleotide-binding protein similar in structure and function to G/sub s..cap alpha../ and G/sub i..cap alpha../ in the adenylate cyclase complex and transducin (G/sub t..cap alpha../) in the retinal photon receptor system. A bovine retinal cDNA clone, lambdaG09, that encodes the complete amino acid sequence of G/sub o..cap alpha../ has been isolated. Nick-translated lambdaG09 cDNA and a 5' end-labeled oligonucleotide probe complementary to a 24 base sequence unique to G/sub o..cap alpha../ were used as probes for Northern analysis of poly(A)/sup +/ RNA from bovine tissues. A major 4.0 kb mRNA was detected in brain and retina and in lesser amounts in heart. Several smaller mRNAs also hybridized with both probes in these tissues and in liver and lung. G/sub o..cap alpha../ protein was identified using rabbit polyclonal antibodies directed against purified bovine G/sub o..cap alpha../ and pertussis toxin-catalyzed (/sup 32/P)ADP-ribosylation. Soluble and membrane proteins were incubated with toxin and (/sup 32/P)NAD and then separated by gel electrophoresis before transfer to nitrocellulose for immunoreaction and subsequent autoradiography. A radiolabeled and immunoreactive 39 kDa membrane protein was found principally in retina and brain, and to a lesser extent, in heart. Thus, in the tissues examined, distribution of the 4.0 kb mRNA parallels that of the immunoreactive G/sub o..cap alpha../ with relatively small amounts in heart and larger amounts in brain and retina.

Research Organization:
NIH, Bethesda, MD
OSTI ID:
6126193
Report Number(s):
CONF-870644-
Journal Information:
Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States), Journal Name: Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States) Vol. 46:6; ISSN FEPRA
Country of Publication:
United States
Language:
English

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Related Subjects

550201* -- Biochemistry-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ADP
ANIMALS
ANTIBODIES
ANTIGENS
AUTORADIOGRAPHY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CATTLE
COENZYMES
COMPARATIVE EVALUATIONS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
DOMESTIC ANIMALS
ELECTROPHORESIS
HYBRIDIZATION
ISOTOPES
LIGHT NUCLEI
MAMMALS
MATERIALS
MESSENGER-RNA
NAD
NUCLEI
NUCLEIC ACIDS
NUCLEOTIDES
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PHOSPHORUS 32
PHOSPHORUS ISOTOPES
PROTEINS
RADIOISOTOPES
RNA
RUMINANTS
TISSUE DISTRIBUTION
TOXIC MATERIALS
TOXINS
VERTEBRATES