Purification of small-size acidic proteoglycan-like domain of carbonic anhydrase IX fused with thioredoxine expressed in Escherichia coli for structural characterization
Keyword(s):
Ca Ix
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AbstractProteoglycan-like (PG) domain of carbonic anhydrase IX (CA IX) is a small-sized acidic domain (8.3 kDa; pI ∼ 3.5) with a very unusual amino acid composition. More than one third of its sequence consists of acidic amino acids and it contains no aromatic residues. It has been revealed that it holds one of the key roles in oncogenetic mechanisms, in which CA IX participates. However, it has not been structurally characterized yet. With these prospects, we developed an expression system of recombinant PG domain production in the form of a fusion protein using thioredoxine (Trx) as the fusion partner in