Bule P, Correia A, Cameron K, Alves VD, Cardoso V, Fontes CMGA, Najmudin S. Overexpression, purification, crystallization and preliminary X-ray characterization of the fourth scaffoldin A cohesin from Acetivibrio cellulolyticus in complex with a dockerin from a family 5 glycoside hydrolase.
Acta Crystallogr F Struct Biol Commun 2014;
70:1065-7. [PMID:
25084383 PMCID:
PMC4118805 DOI:
10.1107/s2053230x14013181]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 06/05/2014] [Indexed: 11/10/2022] Open
Abstract
Cellulosomes are cell-bound multienzyme complexes secreted by anaerobic bacteria that play a crucial role in carbon turnover by degrading plant cell walls to simple sugars. Integration of cellulosomal components occurs via highly ordered protein-protein interactions between cohesin modules located in a molecular scaffold and dockerin modules found in cellulosomal enzymes. Acetivibrio cellulolyticus possesses a complex cellulosome arrangement which is organized by a primary enzyme-binding scaffoldin (ScaA), two anchoring scaffoldins (ScaC and ScaD) and an unusual adaptor scaffoldin (ScaB). A dockerin from a family 5 glycoside hydrolase (GH5), which was engineered to inactivate one of the two putative cohesin-binding interfaces, complexed with one of the ScaA cohesins from A. cellulolyticus has been purified and crystallized, and data were processed to a resolution of 1.57 Å in the orthorhombic space group P212121.
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