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1t1d

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{{STRUCTURE_1t1d| PDB=1t1d | SCENE= }}
{{STRUCTURE_1t1d| PDB=1t1d | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE TETRAMERIZATION DOMAIN OF THE SHAKER POTASSIUM CHANNEL'''
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===CRYSTAL STRUCTURE OF THE TETRAMERIZATION DOMAIN OF THE SHAKER POTASSIUM CHANNEL===
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==Overview==
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The N-terminal, cytoplasmic tetramerization domain (T1) of voltage-gated K+ channels encodes molecular determinants for subfamily-specific assembly of alpha-subunits into functional tetrameric channels. Crystal structures of T1 tetramers from Shaw and Shaker subfamilies reveal a common four-layered scaffolding. Within layer 4, on the hypothetical membrane-facing side of the tetramer, the Shaw T1 tetramer contains four zinc ions; each is coordinated by a histidine and two cysteines from one monomer and by one cysteine from an adjacent monomer. The amino acids involved in coordinating the Zn2+ ion occur in a HX5CX20CC sequence motif that is highly conserved among all Shab, Shaw and Shal subfamily members, but is not found in Shaker subfamily members. We demonstrate by coimmunoprecipitation that a few characteristic residues in the subunit interface are crucial for subfamily-specific tetramerization of the T1 domains.
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(as it appears on PubMed at http://www.pubmed.gov), where 9886290 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9886290}}
==About this Structure==
==About this Structure==
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[[Category: Tetramerization domain]]
[[Category: Tetramerization domain]]
[[Category: X-ray structure]]
[[Category: X-ray structure]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 09:23:03 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 12:22:45 2008''

Revision as of 09:22, 27 July 2008

Image:1t1d.png

Template:STRUCTURE 1t1d

CRYSTAL STRUCTURE OF THE TETRAMERIZATION DOMAIN OF THE SHAKER POTASSIUM CHANNEL

Template:ABSTRACT PUBMED 9886290

About this Structure

1T1D is a Single protein structure of sequence from Aplysia californica. Full crystallographic information is available from OCA.

Reference

Zn2+-binding and molecular determinants of tetramerization in voltage-gated K+ channels., Bixby KA, Nanao MH, Shen NV, Kreusch A, Bellamy H, Pfaffinger PJ, Choe S, Nat Struct Biol. 1999 Jan;6(1):38-43. PMID:9886290

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