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cap alpha. /sub i/-3 cDNA encodes the. cap alpha. subunit of G/sub k/, the stimulatory G protein of receptor-regulated K/sup +/ channels

Journal Article · · J. Biol. Chem.; (United States)
OSTI ID:6838327
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cDNA cloning has identified the presence in the human genome of three genes encoding ..cap alpha.. subunits of pertussis toxin substrates, generically called G/sub i/. They are named ..cap alpha../sub i/-1, ..cap alpha../sub i/-2 and ..cap alpha../sub i/-3. However, none of these genes has been functionally identified with any of the ..cap alpha.. subunits of several possible G proteins, including pertussis toxin-sensitive G/sub p/'s, stimulatory to phospholipase C or A/sub 2/, G/sub i/, inhibitory to adenylyl cyclase, or G/sub k/, stimulatory to a type of K/sup +/ channels. The authors now report the nucleotide sequence and the complete predicted amino acid sequence of human liver ..cap alpha../sub i/-3 and the partial amino acid sequence of proteolytic fragments of the ..cap alpha.. subunit of human erythrocyte G/sub k/. The amino acid sequence of the proteolytic fragment is uniquely encoded by the cDNA of ..cap alpha../sub i/-3, thus identifying it as ..cap alpha../sub k/. The probable identity of ..cap alpha../sub i/-1 with ..cap alpha../sub p/ and possible roles for ..cap alpha../sub i/-2, as well as additional roles for ..cap alpha../sub i/-1 and ..cap alpha../sub i/-3 (..cap alpha../sub k/) are discussed.

Research Organization:
Baylor College of Medicine, Houston, TX (USA)
OSTI ID:
6838327
Journal Information:
J. Biol. Chem.; (United States), Journal Name: J. Biol. Chem.; (United States) Vol. 263:14; ISSN JBCHA
Country of Publication:
United States
Language:
English

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Related Subjects

550201* -- Biochemistry-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ALKALI METAL COMPOUNDS
AMINO ACID SEQUENCE
ANIMALS
ANTIGENS
ATP
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
CATIONS
CHARGED PARTICLES
CLONING
DAYS LIVING RADIOISOTOPES
DIGESTIVE SYSTEM
DNA
DNA SEQUENCING
DNA-CLONING
ERYTHROCYTES
EVEN-ODD NUCLEI
GENES
GLANDS
IONS
ISOTOPES
LIGHT NUCLEI
LIVER
MAMMALS
MAN
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MEMBRANE PROTEINS
MEMBRANE TRANSPORT
MOLECULAR STRUCTURE
NUCLEI
NUCLEIC ACIDS
NUCLEOTIDES
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANS
PHOSPHORUS 32
PHOSPHORUS ISOTOPES
POTASSIUM COMPOUNDS
PRIMATES
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RECEPTORS
RECOMBINANT DNA
STRUCTURAL CHEMICAL ANALYSIS
SULFUR 35
SULFUR ISOTOPES
TOXIC MATERIALS
TOXINS
VERTEBRATES