1egu: Difference between revisions
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[[Image:1egu.gif|left|200px]] | [[Image:1egu.gif|left|200px]] | ||
'''CRYSTAL STRUCTURE OF STREPTOCOCCUS PNEUMONIAE HYALURONATE LYASE AT 1.56 A RESOLUTION''' | {{Structure | ||
|PDB= 1egu |SIZE=350|CAPTION= <scene name='initialview01'>1egu</scene>, resolution 1.56Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=SO4:SULFATE ION'>SO4</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Hyaluronate_lyase Hyaluronate lyase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.2.1 4.2.2.1] | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURE OF STREPTOCOCCUS PNEUMONIAE HYALURONATE LYASE AT 1.56 A RESOLUTION''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1EGU is a [ | 1EGU is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EGU OCA]. | ||
==Reference== | ==Reference== | ||
Structural basis of hyaluronan degradation by Streptococcus pneumoniae hyaluronate lyase., Li S, Kelly SJ, Lamani E, Ferraroni M, Jedrzejas MJ, EMBO J. 2000 Mar 15;19(6):1228-40. PMID:[http:// | Structural basis of hyaluronan degradation by Streptococcus pneumoniae hyaluronate lyase., Li S, Kelly SJ, Lamani E, Ferraroni M, Jedrzejas MJ, EMBO J. 2000 Mar 15;19(6):1228-40. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10716923 10716923] | ||
[[Category: Hyaluronate lyase]] | [[Category: Hyaluronate lyase]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: (alfa5/alfa5) barrel]] | [[Category: (alfa5/alfa5) barrel]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:55:25 2008'' | ||
Revision as of 11:55, 20 March 2008
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| , resolution 1.56Å | |||||||
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| Ligands: | |||||||
| Activity: | Hyaluronate lyase, with EC number 4.2.2.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF STREPTOCOCCUS PNEUMONIAE HYALURONATE LYASE AT 1.56 A RESOLUTION
OverviewOverview
Streptococcus pneumoniae hyaluronate lyase (spnHL) is a pathogenic bacterial spreading factor and cleaves hyaluronan, an important constituent of the extra- cellular matrix of connective tissues, through an enzymatic beta-elimination process, different from the hyaluronan degradation by hydrolases in animals. The mechanism of hyaluronan binding and degradation was proposed based on the 1.56 A resolution crystal structure, substrate modeling and mutagenesis studies on spnHL. Five mutants, R243V, N349A, H399A, Y408F and N580G, were constructed and their activities confirmed our mechanism hypothesis. The important roles of Tyr408, Asn349 and His399 in enzyme catalysis were proposed, explained and confirmed by mutant studies. The remaining weak enzymatic activity of the H399A mutant, the role of the free carboxylate group on the glucuronate residue, the enzymatic behavior on chondroitin and chondroitin sulfate, and the small activity increase in the N580G mutant were explained based on this mechanism. A possible function of the C-terminal beta-sheet domain is to modulate enzyme activity through binding to calcium ions.
About this StructureAbout this Structure
1EGU is a Single protein structure of sequence from Streptococcus pneumoniae. Full crystallographic information is available from OCA.
ReferenceReference
Structural basis of hyaluronan degradation by Streptococcus pneumoniae hyaluronate lyase., Li S, Kelly SJ, Lamani E, Ferraroni M, Jedrzejas MJ, EMBO J. 2000 Mar 15;19(6):1228-40. PMID:10716923
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