Supramolecular assembly and acid resistance of Helicobacter pylori urease

Cited 380 time in webofscience Cited 378 time in scopus
  • Hit : 374
  • Download : 0
DC FieldValueLanguage
dc.contributor.authorHa, Nam-Chulko
dc.contributor.authorOh, Sang-Taekko
dc.contributor.authorSung, Jae Youngko
dc.contributor.authorCha, Kyeung Ahko
dc.contributor.authorLee, Mann Hyungko
dc.contributor.authorOh, Byung-Hako
dc.date.accessioned2013-03-06T03:13:16Z-
dc.date.available2013-03-06T03:13:16Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2001-06-
dc.identifier.citationNATURE STRUCTURAL BIOLOGY, v.8, no.6, pp.505 - 509-
dc.identifier.issn1072-8368-
dc.identifier.urihttp://hdl.handle.net/10203/85648-
dc.description.abstractHelicobacter pylori, an etiologic agent in a variety of gastroduodenal diseases, produces a large amount of urease, which is believed to neutralize gastric acid by producing ammonia for the survival of the bacteria. Up to 30% of the enzyme associates with the surface of intact cells upon lysis of neighboring bacteria. The role of the enzyme at the extracellular location has been a subject of controversy because the purified enzyme is irreversibly inactivated below pH 5. We have determined the crystal structure of H. pylori urease, which has a 1.1 MDa spherical assembly of 12 catalytic units with an outer diameter of similar to 160 Angstrom. Under physiologically relevant conditions, the activity of the enzyme remains unaffected down to pH 3. Activity assays under different conditions indicated that the duster of the 12 active sites on the supramolecular assembly may be critical for the survival of the enzyme at low pH. The structure provides a novel example of a molecular assembly adapted for acid resistance that, together with the low K-m value of the enzyme, is likely to enable the organism to inhabit the hostile niche.-
dc.languageEnglish-
dc.publisherNATURE AMERICA INC-
dc.subjectKLEBSIELLA-AEROGENES UREASE-
dc.subjectHEAT-SHOCK PROTEIN-
dc.subjectBACILLUS-PASTEURII-
dc.subjectCRYSTAL-STRUCTURE-
dc.subjectPURIFICATION-
dc.subjectIDENTIFICATION-
dc.subjectLOCALIZATION-
dc.subjectCOMPLEX-
dc.titleSupramolecular assembly and acid resistance of Helicobacter pylori urease-
dc.typeArticle-
dc.identifier.wosid000168924300012-
dc.identifier.scopusid2-s2.0-0034995248-
dc.type.rimsART-
dc.citation.volume8-
dc.citation.issue6-
dc.citation.beginningpage505-
dc.citation.endingpage509-
dc.citation.publicationnameNATURE STRUCTURAL BIOLOGY-
dc.identifier.doi10.1038/88563-
dc.contributor.localauthorOh, Byung-Ha-
dc.contributor.nonIdAuthorHa, Nam-Chul-
dc.contributor.nonIdAuthorOh, Sang-Taek-
dc.contributor.nonIdAuthorSung, Jae Young-
dc.contributor.nonIdAuthorCha, Kyeung Ah-
dc.contributor.nonIdAuthorLee, Mann Hyung-
dc.type.journalArticleArticle-
dc.subject.keywordPlusKLEBSIELLA-AEROGENES UREASE-
dc.subject.keywordPlusHEAT-SHOCK PROTEIN-
dc.subject.keywordPlusBACILLUS-PASTEURII-
dc.subject.keywordPlusCRYSTAL-STRUCTURE-
dc.subject.keywordPlusPURIFICATION-
dc.subject.keywordPlusIDENTIFICATION-
dc.subject.keywordPlusLOCALIZATION-
dc.subject.keywordPlusCOMPLEX-
Appears in Collection
BS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 380 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0