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Identification of three pertussis toxin substrates (41, 40 and 39 kDa proteins) in mammalian brain Comparison of predicted amino acid sequences from G‐protein α‐subunit genes and cDNAs with partial amino acid sequences from purified proteins
Author(s) -
Itoh Hiroshi,
Katada Toshiaki,
Ui Michio,
Kawasaki Hiroshi,
Suzuki Koichi,
Kaziro Yoshito
Publication year - 1988
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(88)80647-1
Subject(s) - amino acid , gene , pertussis toxin , protein subunit , scn3a , biochemistry , peptide sequence , biology , toxin , identification (biology) , chemistry , g protein , microbiology and biotechnology , g alpha subunit , receptor , botany
We have determined the partial amino acid sequences of the 40 kDa protein, one of the three pertussis toxin substrates in porcine brain. Purified 40 kDa protein from porcine brain was completely digested with TPCK‐trypsin. Digested peptides were separated by reverse‐phase HPLC and subjected to analysis by gas‐phase protein sequencing. Several sequences of porcine brain 40 kDa protein completely matched with those which were deduced from the nucleotide sequences of the human G i 2α gene and rat G i 2α cDNA. On the other hand, the previously determined sequences of the rat brain 41 and 39 kDa proteins were in complete agreement with the predicted amino acid sequences of rat G i 1α and G o α cDNAs, respectively.