Structural highlights
3puz is a 5 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , , |
| Related: | 3puv, 3puw, 3pux, 3puy, 3pv0 |
| Gene: | ECDH10B_4223, malE (Escherichia coli), ECDH10B_4222, malF (Escherichia coli), ECDH10B_4221, malG (Escherichia coli), ECDH10B_4224, malK (Escherichia coli) |
| Resources: | FirstGlance, OCA, RCSB, PDBsum |
Publication Abstract from PubMed
Adenosine triphosphate (ATP)-binding cassette (ABC) transporters convert chemical energy from ATP hydrolysis to mechanical work for substrate translocation. They function by alternating between two states, exposing the substrate-binding site to either side of the membrane. A key question that remains to be addressed is how substrates initiate the transport cycle. Using x-ray crystallography, we have captured the maltose transporter in an intermediate step between the inward- and outward-facing states. We show that interactions with substrate-loaded maltose-binding protein in the periplasm induce a partial closure of the MalK dimer in the cytoplasm. ATP binding to this conformation then promotes progression to the outward-facing state. These results, interpreted in light of biochemical and functional studies, provide a structural basis to understand allosteric communication in ABC transporters.
Crystal structure of the maltose transporter in a pretranslocation intermediate state.,Oldham ML, Chen J Science. 2011 Jun 3;332(6034):1202-5. Epub 2011 May 12. PMID:21566157[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Oldham ML, Chen J. Crystal structure of the maltose transporter in a pretranslocation intermediate state. Science. 2011 Jun 3;332(6034):1202-5. Epub 2011 May 12. PMID:21566157 doi:10.1126/science.1200767
