1qgj

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{{STRUCTURE_1qgj| PDB=1qgj | SCENE= }}
{{STRUCTURE_1qgj| PDB=1qgj | SCENE= }}
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'''ARABIDOPSIS THALIANA PEROXIDASE N'''
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===ARABIDOPSIS THALIANA PEROXIDASE N===
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==Overview==
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The structure of the neutral peroxidase from Arabidopsis thaliana (ATP N) has been determined to a resolution of 1.9 A and a free R value of 20.5%. ATP N has the expected characteristic fold of the class III peroxidases, with a C(alpha) r.m.s.d. of 0.82 A when compared with horseradish peroxidase C (HRP C). HRP C is 54% identical to ATP N in sequence. When the structures of four class III plant peroxidases are superimposed, the regions with structural differences are non-randomly distributed; all are located in one half of the molecule. The architecture of the haem pocket of ATP N is very similar to that of HRP C, in agreement with the low small-molecule substrate specificity of all class III peroxidases. The structure of ATP N suggests that the pH dependence of the substrate turnover will differ from that of HRP C owing to differences in polarity of the residues in the substrate-access channel. Since there are fewer hydrogen bonds to haem C17 propionate O atoms in ATP N than in HRP C, it is suggested that ATP N will lose haem more easily than HRP C. Unlike almost all other class III plant peroxidases, ATP N has a free cysteine residue at a similar position to the suggested secondary substrate-binding site in lignin peroxidase.
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(as it appears on PubMed at http://www.pubmed.gov), where 10713531 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10713531}}
==About this Structure==
==About this Structure==
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[[Category: Oxidoreductase]]
[[Category: Oxidoreductase]]
[[Category: Peroxidase]]
[[Category: Peroxidase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 06:14:29 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 03:22:13 2008''

Revision as of 00:22, 28 July 2008

Image:1qgj.png

Template:STRUCTURE 1qgj

ARABIDOPSIS THALIANA PEROXIDASE N

Template:ABSTRACT PUBMED 10713531

About this Structure

1QGJ is a Single protein structure of sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA.

Reference

Arabidopsis thaliana peroxidase N: structure of a novel neutral peroxidase., Mirza O, Henriksen A, Ostergaard L, Welinder KG, Gajhede M, Acta Crystallogr D Biol Crystallogr. 2000 Mar;56(Pt 3):372-5. PMID:10713531

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