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The ‘heavy’ subunit of the photosynthetic reaction centre from Rhodopseudomonas viridis : isolation of the gene, nucleotide and amino acid sequence
Author(s) -
Michel H.,
Weyer K.A.,
Gruenberg H.,
Lottspeich F.
Publication year - 1985
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1002/j.1460-2075.1985.tb03835.x
Subject(s) - planck , physics , biology , stereochemistry , chemistry , quantum mechanics
The gene coding for the ‘heavy’ subunit of the photosynthetic reaction centre from Rhodopseudomonas viridis was isolated in an expression vector. Expression of the heavy subunit in Escherichia coli was detected with antibodies raised against crystalline reaction centres. The entire subunit, and not a fusion protein, was expressed in E. coli . The protein coding region of the gene was sequenced and the amino acid sequence derived. Part of the amino acid sequence was confirmed by chemical sequence analysis of the protein. The heavy subunit consists of 258 amino acids and its mol. wt. is 28 345. It possesses one membrane‐spanning α‐helical segment, as was revealed by the concomitant X‐ray structure analysis.