2cl2 | pdb_00002cl2

ENDO-1,3(4)-BETA-GLUCANASE FROM PHANEROCHAETE CHRYSOSPORIUM, SOLVED USING NATIVE SULFUR SAD, EXHIBITING INTACT HEPTASACCHARIDE GLYCOSYLATION

File:2cl2.jpg

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2cl2, resolution 1.35Å
Ligands:	BMA, MAN, NAG
Activity:	Endo-1,3(4)-beta-glucanase, with EC number 3.2.1.6
Resources:	FirstGlance, OCA, PDBsum, RCSB
Coordinates:	save as pdb, mmCIF, xml

Overview

Laminarinase Lam16A from Phanerochaete chrysosporium was recombinantly expressed in Pichia pastoris, crystallized and the structure was solved at 1.34 A resolution using native sulfur SAD X-ray crystallography. It is the first structure of a non-specific 1,3(4)-beta-D-glucanase from glycoside hydrolase family 16 (GH16). P. chrysosporium is a wood-degrading basidiomycete fungus and Lam16A is the predominant extracellular protein expressed when laminarin is used as the sole carbon source. The protein folds into a curved beta-sandwich homologous to those of other known GH16 enzyme structures (especially kappa-carrageenase from Pseudoalteromonas carrageenovora and beta-agarase from Zobelia galactanivorans). A notable likeness is also evident with the related glycoside hydrolase family 7 (GH7) enzymes. A mammalian lectin, p58/ERGIC, as well as polysaccharide lyase (PL7) enzymes also showed significant similarity to Lam16A. The enzyme has two potential N-glycosylation sites. One such site, at Asn43, displayed a branched heptasaccharide sufficiently stabilized to be interpreted from the X-ray diffraction data. The other N-glycosylation motif was found close to the catalytic centre and is evidently not glycosylated.

About this Structure

2CL2 is a Single protein structure of sequence from Phanerochaete chrysosporium. Full crystallographic information is available from OCA.

Reference

X-ray crystallographic native sulfur SAD structure determination of laminarinase Lam16A from Phanerochaete chrysosporium., Vasur J, Kawai R, Larsson AM, Igarashi K, Sandgren M, Samejima M, Stahlberg J, Acta Crystallogr D Biol Crystallogr. 2006 Nov;62(Pt 11):1422-9. Epub 2006, Oct 18. PMID:17057348

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