1b2c

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{{STRUCTURE_1b2c| PDB=1b2c | SCENE= }}
{{STRUCTURE_1b2c| PDB=1b2c | SCENE= }}
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'''PH AFFECTS GLU B13 SWITCHING AND SULFATE BINDING IN CUBIC INSULIN CRYSTALS (PH 6.26 COORDINATES)'''
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===PH AFFECTS GLU B13 SWITCHING AND SULFATE BINDING IN CUBIC INSULIN CRYSTALS (PH 6.26 COORDINATES)===
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==Overview==
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Structures of porcine insulin crystals soaked in 1 M sodium sulfate at pH 5.00, 5.53, 5.80, 6.00, 6.16, 6.26, 6.35, 6.50, 6.98 and 9.00 have been determined at between 1.7 and 1.9 A resolution. GluB13 exhibits a single conformation at pH &lt;/= 5.80, two conformations between pH 6.00 and 6.98 and a single conformation at pH 9.00. Between pH 6.00 and 6.98, the conformation of GluB13 switches from one rotamer to another rotamer. Between pH 6.16 and 6.26, PheB1 undergoes a significant conformational change. By pH 9.00 many residues have undergone relatively large shifts and HisB10 exhibits a double conformation. As a result of the pH increase, the occupancy of the sulfate ion decreases from a maximum of 1.00 at pH 5.00 to a minimum of 0.46 at pH 6.50. Comparison of the structures, the observed and calculated structure factors and map correlation coefficients indicate that the porcine insulin structure changes gradually as a function of pH.
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(as it appears on PubMed at http://www.pubmed.gov), where 12657786 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12657786}}
==About this Structure==
==About this Structure==
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[[Category: Diao, J S.]]
[[Category: Diao, J S.]]
[[Category: Hormone]]
[[Category: Hormone]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 10:58:30 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 18:04:43 2008''

Revision as of 15:04, 30 June 2008

Template:STRUCTURE 1b2c

PH AFFECTS GLU B13 SWITCHING AND SULFATE BINDING IN CUBIC INSULIN CRYSTALS (PH 6.26 COORDINATES)

Template:ABSTRACT PUBMED 12657786

About this Structure

1B2C is a Protein complex structure of sequences from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Crystallographic titration of cubic insulin crystals: pH affects GluB13 switching and sulfate binding., Diao J, Acta Crystallogr D Biol Crystallogr. 2003 Apr;59(Pt 4):670-6. Epub 2003, Mar 25. PMID:12657786

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