1u7c
From Proteopedia
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|PDB= 1u7c |SIZE=350|CAPTION= <scene name='initialview01'>1u7c</scene>, resolution 1.85Å | |PDB= 1u7c |SIZE=350|CAPTION= <scene name='initialview01'>1u7c</scene>, resolution 1.85Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=NME:METHYLAMINE'>NME</scene> | + | |LIGAND= <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NME:METHYLAMINE'>NME</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= amtB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |GENE= amtB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1u77|1U77]], [[1u7g|1U7G]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1u7c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u7c OCA], [http://www.ebi.ac.uk/pdbsum/1u7c PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1u7c RCSB]</span> | ||
}} | }} | ||
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[[Category: Robles-Colmenares, Y.]] | [[Category: Robles-Colmenares, Y.]] | ||
[[Category: Stroud, R M.]] | [[Category: Stroud, R M.]] | ||
| - | [[Category: NME]] | ||
[[Category: ammonia channel]] | [[Category: ammonia channel]] | ||
[[Category: membrane protein]] | [[Category: membrane protein]] | ||
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[[Category: transmembrane helice]] | [[Category: transmembrane helice]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:06:18 2008'' |
Revision as of 21:06, 30 March 2008
| |||||||
| , resolution 1.85Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , | ||||||
| Gene: | amtB (Escherichia coli) | ||||||
| Related: | 1U77, 1U7G
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of AmtB from E.Coli with Methyl Ammonium.
Overview
The first structure of an ammonia channel from the Amt/MEP/Rh protein superfamily, determined to 1.35 angstrom resolution, shows it to be a channel that spans the membrane 11 times. Two structurally similar halves span the membrane with opposite polarity. Structures with and without ammonia or methyl ammonia show a vestibule that recruits NH4+/NH3, a binding site for NH4+, and a 20 angstrom-long hydrophobic channel that lowers the NH4+ pKa to below 6 and conducts NH3. Favorable interactions for NH3 are seen within the channel and use conserved histidines. Reconstitution of AmtB into vesicles shows that AmtB conducts uncharged NH3.
About this Structure
1U7C is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Mechanism of ammonia transport by Amt/MEP/Rh: structure of AmtB at 1.35 A., Khademi S, O'Connell J 3rd, Remis J, Robles-Colmenares Y, Miercke LJ, Stroud RM, Science. 2004 Sep 10;305(5690):1587-94. PMID:15361618
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