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X-ray crystallograp...
X-ray crystallographic native sulfur SAD structure determination of laminarinase Lam16A from Phanerochaete chrysosporium
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Vasur, Jonas (author)
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Kawai, Rie (author)
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- Larsson, Anna M. (author)
- Uppsala universitet,Institutionen för cell- och molekylärbiologi
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Igarashi, Kiyohiko (author)
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Sandgren, Mats (author)
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Samejima, Masahiro (author)
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Ståhlberg, Jerry (author)
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(creator_code:org_t)
- 2006
- 2006
- English.
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In: Acta Crystallographica Section D. - 0907-4449 .- 1399-0047. ; 62:11, s. 1422-1429
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- 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 Pseudo-alteromonas 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.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- Biology
- Biologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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