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1xb2

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{{STRUCTURE_1xb2| PDB=1xb2 | SCENE= }}
{{STRUCTURE_1xb2| PDB=1xb2 | SCENE= }}
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'''Crystal Structure of Bos taurus mitochondrial Elongation Factor Tu/Ts Complex'''
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===Crystal Structure of Bos taurus mitochondrial Elongation Factor Tu/Ts Complex===
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==Overview==
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The three-dimensional structure of the bovine mitochondrial elongation factor (EF)-Tu.Ts complex (EF-Tumt.Tsmt) has been determined to 2.2-A resolution using the multi-wavelength anomalous dispersion experimental method. This complex provides the first insight into the structure of EF-Tsmt. EF-Tsmt is similar to Escherichia coli and Thermus thermophilus EF-Ts in the amino-terminal domain. However, the structure of EF-Tsmt deviates considerably in the core domain with a five-stranded beta-sheet forming a portion of subdomain N of the core. In E. coli EF-Ts, this region is composed of a three-stranded sheet. The coiled-coil domain of the E. coli EF-Ts is largely eroded in EF-Tsmt, in which it consists of a large loop packed against subdomain C of the core. The conformation of bovine EF-Tumt in complex with EF-Tsmt is distinct from its conformation in the EF-Tumt.GDP complex. When domain III of bovine EF-Tumt.GDP is superimposed on domain III of EF-Tumt in the EF-Tumt.Tsmt complex, helix B from domain I is also almost superimposed. However, the rest of domain I is rotated relative to this helix toward domain II, which itself is rotated toward domain I relative to domain III. Extensive contacts are observed between the amino-terminal domain of EF-Tsmt and domain I of EF-Tumt. Furthermore, the conserved TDFV sequence of EF-Tsmt also contacts domain I with the side chain of Asp139 contacting helix B of EF-Tumt and inserting the side chain of Phe140 between helices B and C. The structure of the EF-Tumt.Tsmt complex provides new insights into the nucleotide exchange mechanism and provides a framework for explaining much of the mutational data obtained for this complex.
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{{ABSTRACT_PUBMED_15557323}}
==About this Structure==
==About this Structure==
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[[Category: Spremulli, L L.]]
[[Category: Spremulli, L L.]]
[[Category: Protein-protein complex]]
[[Category: Protein-protein complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 14:48:08 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 16:35:51 2008''

Revision as of 13:35, 29 July 2008

Image:1xb2.png

Template:STRUCTURE 1xb2

Crystal Structure of Bos taurus mitochondrial Elongation Factor Tu/Ts Complex

Template:ABSTRACT PUBMED 15557323

About this Structure

1XB2 is a Protein complex structure of sequences from Bos taurus. Full crystallographic information is available from OCA.

Reference

Crystal structure of the bovine mitochondrial elongation factor Tu.Ts complex., Jeppesen MG, Navratil T, Spremulli LL, Nyborg J, J Biol Chem. 2005 Feb 11;280(6):5071-81. Epub 2004 Nov 22. PMID:15557323

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