2ett
From Proteopedia
| Line 8: | Line 8: | ||
|GENE= SNX22 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= SNX22 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
|DOMAIN=<span class='plainlinks'>[http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=pfam00787 PX]</span> | |DOMAIN=<span class='plainlinks'>[http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=pfam00787 PX]</span> | ||
| - | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ett FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ett OCA], [http://www.ebi.ac.uk/pdbsum/2ett PDBsum | + | |RELATEDENTRY= |
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ett FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ett OCA], [http://www.ebi.ac.uk/pdbsum/2ett PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2ett RCSB]</span> | ||
}} | }} | ||
| Line 41: | Line 42: | ||
[[Category: structural genomics,protein structure initiative]] | [[Category: structural genomics,protein structure initiative]] | ||
| - | ''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 02:53:41 2008'' |
Revision as of 23:53, 30 March 2008
| |||||||
| Gene: | SNX22 (Homo sapiens) | ||||||
| Domains: | PX | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Solution Structure of Human Sorting Nexin 22 PX Domain
Overview
The sorting nexins (SNXs) constitute a large group of PX domain-containing proteins that play critical roles in protein trafficking. We report here the solution structure of human sorting nexin 22 (SNX22). Although SNX22 has <30% sequence identity with any PX domain protein of known structure, it was found to contain the alpha/beta fold and compact structural core characteristic of PX domains. Analysis of the backbone dynamics of SNX22 by NMR relaxation measurements revealed that the two walls of the ligand binding cleft undergo internal motions: on the picosecond timescale for the beta1/beta2 loop and on the micro- to millisecond timescale for the loop between the polyproline motif and helix alpha2. Regions of the SNX22 structure that differ from those of other PX domains include the loop connecting strands beta1 and beta2 and the loop connecting helices alpha1 and alpha2, which appear to be more mobile than corresponding loops in other known structures. The interaction of dibutanoyl-phosphatidylinositol-3-phosphate (dibutanoyl-PtdIns(3)P) with SNX22 was investigated by an NMR titration experiment, which identified the binding site in a basic cleft and indicated that ligand binding leads only to a local structural rearrangement as has been found with other PX domains. Because motions in the loops are damped out when dibutanoyl-PtdIns(3)P binds, entropic effects could contribute to the lower affinity of SNX22 for this ligand compared to other PX domains.
About this Structure
2ETT is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Solution structure of human sorting nexin 22., Song J, Zhao KQ, Newman CL, Vinarov DA, Markley JL, Protein Sci. 2007 May;16(5):807-14. Epub 2007 Mar 30. PMID:17400918
Page seeded by OCA on Mon Mar 31 02:53:41 2008
Categories: Homo sapiens | Single protein | CESG, Center for Eukaryotic Structural Genomics. | Lee, M S. | Markley, J L. | Newman, C L. | Song, J. | Tyler, R C. | Zhao, Q. | Bc019655 | Center for eukaryotic structural genomic | Cesg | Hs 157607 | Psi | Px domain | Snx22 human | Sorting nexin 22 | Structural genomics,protein structure initiative
