Abstract
The ribosomal A-protein, equivalent to the ribosomal protein L12 from Escherichia coli, has been sequenced from the anaerobic halophilic eubacterium Haloanaerobium praevalens (DSM 2228). The protein contains 122 amino acids, has a composition of Asp 6, Asn 2, Thr 2, Ser 6, Glu 22, Pro 2, Gly 13, Ala 19, Val 12, Met 4, Ile 5, Leu 11, Phe 3, Lys 14, Arg 1 and has a molecular weight of 12691. The hydrophilicity profile was determined for this protein. A phylogenetic or cluster tree was calculated from computer analysis of the sequence data on eubacterial ribosomal A-proteins. H. praevalens clusters with a group that includes Bacillus subtilis, Micrococcus lysodeikticus, Bacillus stearothermophilus and Clostridium pasteurianum.
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