Hemocyanins in Spiders, XIX. Complete Amino-Acid Sequence of SubunitdfromEurypelma californicumHemocyanin, and Comparison to Chaine
- 1 January 1983
- journal article
- research article
- Published by Walter de Gruyter GmbH in Hoppe-Seyler´s Zeitschrift Für Physiologische Chemie
- Vol. 364 (2) , 1383-1410
- https://doi.org/10.1515/bchm2.1983.364.2.1383
Abstract
The complete primary structure of subunit d of the hemocyanin from the tarantula E. californicum was determined by manual micro sequencing. Subunit d of MW = 73,000 is split about in the middle of the chain during limited trypsinolysis, only 1 single bond being attacked. The whole chain contains 14 methionine residues and after cyanogen bromide cleavage 15 peptides could be isolated by gel and ion exchange chromatography and high pressure liquid chromatography. The cyanogen bromide peptides and the large (MW = 34,000 and 37,000, respectively) fragments resulting from limited trypsinolysis, were further cleaved with trypsin, chymotrypsin, Staphylococcus aureus proteinase, formic acid and Astacus fluviatilis proteinase, the latter being very useful in obtaining certain overlapping peptides. The total chain length is 627 residues. Carbohydrate side chains were not found. The sequence is discussed with respect to the gross physical properties of the subunit, to homologies with subunit e and the cleavage specifities of the enzymes employed.This publication has 26 references indexed in Scilit:
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