7vu2 | pdb_00007vu2

Chitoporin from Serratia marcescens

Loading... Status: waiting for Mol* initialization Structural highlights 7vu2 is a 1 chain structure with sequence from Serratia marcescens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.85Å Ligands: C8E, CA, MES Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Serratia marcescens is an opportunistic pathogen that commonly causes hospital-acquired infections and can utilize chitin-enriched nutrients as an alternative energy source. This study reports the identification of a chitoporin (ChiP), termed SmChiP, from the outer membrane of S. marcescens. Sequence alignment with genetically characterized ChiPs suggests that SmChiP is more closely related to the monomeric EcChiP from Escherichia coli than to the trimeric VhChiP from Vibrio campbellii. A single crystal of SmChiP grown under the condition 22%(w/v) PEG 8000, 0.1 M calcium acetate, 0.1 M MES pH 6.0 diffracted X-ray synchrotron radiation to 1.85 A resolution. SmChiP co-crystallized with chitohexaose under the condition 19%(w/v) PEG 1500, 2 M ammonium phosphate monobasic, 0.1 M HEPES pH 7.0 diffracted X-rays to 2.70 A resolution. Preliminary crystallographic analysis shows that both SmChiP crystal forms contain one molecule per asymmetric unit and that they belong to the tetragonal space groups P4(2)2(1)2 and P4(1)2(1)2, respectively. The SmChiP crystal has unit-cell parameters a = 82.97, b = 82.97, c = 189.53 A, alpha = beta = gamma = 90 degrees , while the crystal of SmChiP in complex with chitohexaose has unit-cell parameters a = 73.24, b = 73.24, c = 213.46 A, alpha = beta = gamma = 90 degrees . Initial assessment of the complex structure clearly revealed electron density for the sugar ligand. Structure determination of SmChiP in the absence and presence of chitohexaose should reveal the molecular basis of chitin utilization by S. marcescens. Chitoporin from Serratia marcescens: recombinant expression, purification and crystallization.,Amornloetwattana R, Robinson RC, Soysa HSM, van den Berg B, Suginta W Acta Crystallogr F Struct Biol Commun. 2020 Nov 1;76(Pt 11):536-543. doi: , 10.1107/S2053230X20013874. Epub 2020 Oct 29. PMID:33135672 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Porin 3D structures

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