1mq9
From Proteopedia
(New page: 200px<br /> <applet load="1mq9" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mq9, resolution 2.00Å" /> '''Crystal structure o...) |
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caption="1mq9, resolution 2.00Å" /> | caption="1mq9, resolution 2.00Å" /> | ||
'''Crystal structure of high affinity alphaL I domain with ligand mimetic crystal contact'''<br /> | '''Crystal structure of high affinity alphaL I domain with ligand mimetic crystal contact'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1MQ9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with MN as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 1MQ9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=MN:'>MN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MQ9 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: rossmann fold]] | [[Category: rossmann fold]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Feb 15 16:25:25 2008'' |
Revision as of 14:25, 15 February 2008
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Crystal structure of high affinity alphaL I domain with ligand mimetic crystal contact
Overview
The structure of the I domain of integrin alpha L beta 2 bound to the Ig, superfamily ligand ICAM-1 reveals the open ligand binding conformation and, the first example of an integrin-IgSF interface. The I domain Mg2+, directly coordinates Glu-34 of ICAM-1, and a dramatic swing of I domain, residue Glu-241 enables a critical salt bridge. Liganded and unliganded, structures for both high- and intermediate-affinity mutant I domains, reveal that ligand binding can induce conformational change in the alpha L, I domain and that allosteric signals can convert the closed conformation, to intermediate or open conformations without ligand binding. Pulling down, on the C-terminal alpha 7 helix with introduced disulfide bonds ratchets, the beta 6-alpha 7 loop into three different positions in the closed, intermediate, and open conformations, with a progressive increase in, affinity.
About this Structure
1MQ9 is a Single protein structure of sequence from Homo sapiens with as ligand. Full crystallographic information is available from OCA.
Reference
Structures of the alpha L I domain and its complex with ICAM-1 reveal a shape-shifting pathway for integrin regulation., Shimaoka M, Xiao T, Liu JH, Yang Y, Dong Y, Jun CD, McCormack A, Zhang R, Joachimiak A, Takagi J, Wang JH, Springer TA, Cell. 2003 Jan 10;112(1):99-111. PMID:12526797
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