1gzb

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[[Image:1gzb.gif|left|200px]]
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{{STRUCTURE_1gzb| PDB=1gzb | SCENE= }}
{{STRUCTURE_1gzb| PDB=1gzb | SCENE= }}
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'''PEROXIDASE'''
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===PEROXIDASE===
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==Overview==
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In the presence of ammonium sulfate the absorption spectra of a peroxidase from the fungus Arthromyces ramosus (ARP) showed that the low-spin component increased as the pH increased from 6.0 to 9.0, whereas in its absence ARP remained in the high-spin state in the pH range investigated. The crystal structure of ARP at pH 4.5 in the presence of ammonium sulfate at 1.8 A resolution showed that the electron density at the 6th position of the heme iron seen at pH 7.5 had disappeared and that the iron atom deviated markedly from the heme plane. These observations strongly suggest that under physiological conditions the heme of ARP is in the pentacoordinated high-spin state and that at a high pH the heme iron is able to bind ammonia, forming the low-spin state. The location of the water molecule at the distal side of the heme in peroxidases is also discussed.
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(as it appears on PubMed at http://www.pubmed.gov), where 8557120 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8557120}}
==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 Fri May 2 18:12:39 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 06:21:30 2008''

Revision as of 03:21, 1 July 2008

Image:1gzb.png

Template:STRUCTURE 1gzb

PEROXIDASE

Template:ABSTRACT PUBMED 8557120

About this Structure

1GZB is a Single protein structure of sequence from Eukaryota. Full crystallographic information is available from OCA.

Reference

Pentacoordination of the heme iron of Arthromyces ramosus peroxidase shown by a 1.8 A resolution crystallographic study at pH 4.5., Kunishima N, Amada F, Fukuyama K, Kawamoto M, Matsunaga T, Matsubara H, FEBS Lett. 1996 Jan 15;378(3):291-4. PMID:8557120

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