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1hab

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(New page: 200px<br /> <applet load="1hab" size="450" color="white" frame="true" align="right" spinBox="true" caption="1hab, resolution 2.3&Aring;" /> '''CROSSLINKED HAEMOGLO...)
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Revision as of 10:57, 8 November 2007

Image:1hab.gif

1hab, resolution 2.3Å

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CROSSLINKED HAEMOGLOBIN

Overview

Hemoglobin has been a long-standing paradigm for understanding protein, allostery. Here, the x-ray structures of two chemically crosslinked, fully, liganded hemoglobins, alpha2beta82CA82beta and alpha2beta82ND82beta, are, described at 2.3 A and 2.6 A resolution, respectively. Strikingly, these, crosslinked hemoglobins assume intermediate conformations that lie between, those of R and the controversial liganded hemoglobin state R2 rather than, between R and T. Thus, these structures support only a T left and right, arrow R left and right arrow R2 allosteric pathway and underscore the, physiological importance of the R2 conformation.

About this Structure

1HAB is a Protein complex structure of sequences from Homo sapiens with HEM, CMO and CIN as ligands. Full crystallographic information is available from OCA.

Reference

Allosteric intermediates indicate R2 is the liganded hemoglobin end state., Schumacher MA, Zheleznova EE, Poundstone KS, Kluger R, Jones RT, Brennan RG, Proc Natl Acad Sci U S A. 1997 Jul 22;94(15):7841-4. PMID:9223274

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