The primary structure of two chlorosome proteins from Chloroflexus aurantiacus.

The complete nucleotide sequence of two chlorosome proteins with apparent molecular weights of M(r) 18,000 and M(r) 11,000 from Chloroflexus aurantiacus have been determined. The two polypeptides were 145 and 97 amino acids long and possessed true molecular masses of 15,545 and 10,820 Da, respectively. Protein chemical sequencing was done in parallel to confirm the primary structure deduced from nucleotide sequencing. By Northern blot analysis of RNA isolated from phototrophically grown cells a transcript of 0.95 kb was detected which is the expected length for a mRNA encoding both genes.