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1epj

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[[Image:1epj.jpg|left|200px]]
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{{Seed}}
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[[Image:1epj.png|left|200px]]
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{{STRUCTURE_1epj| PDB=1epj | SCENE= }}
{{STRUCTURE_1epj| PDB=1epj | SCENE= }}
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'''THREE-DIMENSIONAL NUCLEAR MAGNETIC RESONANCE STRUCTURES OF MOUSE EPIDERMAL GROWTH FACTOR IN ACIDIC AND PHYSIOLOGICAL PH SOLUTIONS'''
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===THREE-DIMENSIONAL NUCLEAR MAGNETIC RESONANCE STRUCTURES OF MOUSE EPIDERMAL GROWTH FACTOR IN ACIDIC AND PHYSIOLOGICAL PH SOLUTIONS===
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==Overview==
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The three-dimensional structures of epidermal growth factors (EGF) previously reported were all in acidic solutions (pH 2.0-3.2), at which pHs EGF cannot bind to the receptor. Here we studied the structure of mouse EGF at pH 6.8, where EGF is physiologically active, and compared it with the structure at pH 2.0 by CD and NMR. From pH dependence of CD spectra and a comparison between the chemical shifts of the proton resonances at pH 6.8 and 2.0, the conformations at two pHs were found to be nearly identical except for the C-terminal tail region. The three-dimensional structures at pH 6.8 and 2.0 were determined independently by a combination of two-dimensional 1H NMR and stimulated annealing calculations using the program XPLOR. The calculations were based on 261 distance constraints at pH 6.8 and 355 distance and 24 torsion angle constraints at pH 2.0. The conformational difference of the C-terminal domain (residues 33-50) was detected between the two structures, which were supported by CD and the chemical shift comparison. The positions of the side chains of Leu47, Arg48, Trp49, and Trp50 are changed probably by the effect of the deprotonation of Asp46. Considering the fact that Leu47 is essential in EGF binding to the receptor, this conformational difference may be important in receptor recognition.
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(as it appears on PubMed at http://www.pubmed.gov), where 1445923 is the PubMed ID number.
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{{ABSTRACT_PUBMED_1445923}}
==About this Structure==
==About this Structure==
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1EPJ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EPJ OCA].
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1EPJ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EPJ OCA].
==Reference==
==Reference==
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[[Category: Kohda, D.]]
[[Category: Kohda, D.]]
[[Category: Growth factor]]
[[Category: Growth factor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 15:22:41 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 01:30:57 2008''

Revision as of 22:31, 30 June 2008

Image:1epj.png

Template:STRUCTURE 1epj

THREE-DIMENSIONAL NUCLEAR MAGNETIC RESONANCE STRUCTURES OF MOUSE EPIDERMAL GROWTH FACTOR IN ACIDIC AND PHYSIOLOGICAL PH SOLUTIONS

Template:ABSTRACT PUBMED 1445923

About this Structure

1EPJ is a Single protein structure of sequence from Mus musculus. Full experimental information is available from OCA.

Reference

Three-dimensional nuclear magnetic resonance structures of mouse epidermal growth factor in acidic and physiological pH solutions., Kohda D, Inagaki F, Biochemistry. 1992 Dec 1;31(47):11928-39. PMID:1445923

Page seeded by OCA on Tue Jul 1 01:30:57 2008

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