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2adx

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{{STRUCTURE_2adx| PDB=2adx | SCENE= }}
{{STRUCTURE_2adx| PDB=2adx | SCENE= }}
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'''FIFTH EGF-LIKE DOMAIN OF THROMBOMODULIN (TMEGF5), NMR, MINIMIZED AVERAGE STRUCTURE'''
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===FIFTH EGF-LIKE DOMAIN OF THROMBOMODULIN (TMEGF5), NMR, MINIMIZED AVERAGE STRUCTURE===
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==Overview==
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The structure of the fifth EGF-like domain (residues Q387 to E426) of thrombomodulin (TMEGF5) has been determined by two-dimensional NMR. TMEGF5 binds to thrombin with a Ki of 1.9 microM and has been shown to have a novel disulfide bonding pattern in a fully active fragment of TM. In EGF, the disulfide bonding pattern is (1-3,2-4, 5-6), while TMEGF5 has an uncrossed (1-2,3-4,5-6) pattern. The structure of this novel domain, determined from 483 NOE-derived distance restraints, appears to have diverged from the common EGF-like structure. Superposition of the 14 lowest-energy structures of TMEGF5 gives an overall r.m.s.d. of 1.09 A for the backbone atoms. The central two-stranded beta-sheet common to all EGF-like domains is not present in TMEGF5. The A loop, residues C390 to C395, is twisted away from interacting with the B loop, residues C399 to C407, as in EGF, and is close to the C loop, residues C409 to C421. This twist causes the N and C termini to be closer together in TMEGF5 than in EGF. Most of the residues that are important for activity lie on one face of the molecule, which is likely to be the thrombin-binding surface of the domain. The structure of the C loop within the domain, which is a beta-hairpin similar to EGF, is similar to the structure of a synthetic version of the loop bound to thrombin as determined by transferred NOE experiments. Despite the similarity in the structures of the loops, the residues immediately following C421 are in different positions in the two structures suggesting that these "tail" residues may change conformation upon thrombin binding.Copyright 1997 Academic Press Limited
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(as it appears on PubMed at http://www.pubmed.gov), where 9367781 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9367781}}
==About this Structure==
==About this Structure==
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2ADX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ADX OCA].
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2ADX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ADX OCA].
==Reference==
==Reference==
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[[Category: Protein c]]
[[Category: Protein c]]
[[Category: Thrombin]]
[[Category: Thrombin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 18:55:28 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 07:26:32 2008''

Revision as of 04:26, 28 July 2008

Image:2adx.png

Template:STRUCTURE 2adx

FIFTH EGF-LIKE DOMAIN OF THROMBOMODULIN (TMEGF5), NMR, MINIMIZED AVERAGE STRUCTURE

Template:ABSTRACT PUBMED 9367781

About this Structure

2ADX is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

Structure of the fifth EGF-like domain of thrombomodulin: An EGF-like domain with a novel disulfide-bonding pattern., Sampoli Benitez BA, Hunter MJ, Meininger DP, Komives EA, J Mol Biol. 1997 Nov 7;273(4):913-26. PMID:9367781

Page seeded by OCA on Mon Jul 28 07:26:32 2008

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