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1abs

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{{Seed}}
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{{STRUCTURE_1abs| PDB=1abs | SCENE= }}
{{STRUCTURE_1abs| PDB=1abs | SCENE= }}
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'''PHOTOLYSED CARBONMONOXY-MYOGLOBIN AT 20 K'''
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===PHOTOLYSED CARBONMONOXY-MYOGLOBIN AT 20 K===
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==Overview==
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Myoglobin is a globular haem protein that reversibly binds ligands such as O2 and CO. Single photons of visible light can break the covalent bond between CO and the haem iron in carbon-monoxy-myoglobin (MbCO) and thus form an unstable intermediate, Mb*CO, with the CO inside the protein. The ensuing rebinding process has been extensively studied as a model for the interplay of dynamics, structure and function in protein reactions. We have used X-ray crystallography at liquid-helium temperatures to determine the structure of Mb*CO to a resolution of 1.5 A. The photodissociated CO lies on top of the haem pyrrole ring C. Comparison with the CO-bound and unligated myoglobin structures reveals that on photodissociation of the CO, the haem 'domes', the iron moves partially out of the haem plane, the iron-proximal histidine bonds is compressed, the F helix is strained and the distal histidine swings towards the outside of the ligand-binding pocket.
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The line below this paragraph, {{ABSTRACT_PUBMED_7935843}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 7935843 is the PubMed ID number.
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{{ABSTRACT_PUBMED_7935843}}
==About this Structure==
==About this Structure==
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[[Category: Oxygen storage]]
[[Category: Oxygen storage]]
[[Category: Respiratory protein]]
[[Category: Respiratory protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 10:04:49 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 16:32:54 2008''

Revision as of 13:32, 30 June 2008

Image:1abs.png

Template:STRUCTURE 1abs

PHOTOLYSED CARBONMONOXY-MYOGLOBIN AT 20 K

Template:ABSTRACT PUBMED 7935843

About this Structure

1ABS is a Single protein structure of sequence from Physeter catodon. Full crystallographic information is available from OCA.

Reference

Crystal structure of photolysed carbonmonoxy-myoglobin., Schlichting I, Berendzen J, Phillips GN Jr, Sweet RM, Nature. 1994 Oct 27;371(6500):808-12. PMID:7935843

Page seeded by OCA on Mon Jun 30 16:32:54 2008

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