1b5f: Difference between revisions
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'''NATIVE CARDOSIN A FROM CYNARA CARDUNCULUS L.''' | {{Structure | ||
|PDB= 1b5f |SIZE=350|CAPTION= <scene name='initialview01'>1b5f</scene>, resolution 1.72Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= | |||
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'''NATIVE CARDOSIN A FROM CYNARA CARDUNCULUS L.''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1B5F is a [ | 1B5F is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Cynara_cardunculus Cynara cardunculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B5F OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of cardosin A, a glycosylated and Arg-Gly-Asp-containing aspartic proteinase from the flowers of Cynara cardunculus L., Frazao C, Bento I, Costa J, Soares CM, Verissimo P, Faro C, Pires E, Cooper J, Carrondo MA, J Biol Chem. 1999 Sep 24;274(39):27694-701. PMID:[http:// | Crystal structure of cardosin A, a glycosylated and Arg-Gly-Asp-containing aspartic proteinase from the flowers of Cynara cardunculus L., Frazao C, Bento I, Costa J, Soares CM, Verissimo P, Faro C, Pires E, Cooper J, Carrondo MA, J Biol Chem. 1999 Sep 24;274(39):27694-701. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10488111 10488111] | ||
[[Category: Cynara cardunculus]] | [[Category: Cynara cardunculus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: hydrolase(aspartic proteinase)]] | [[Category: hydrolase(aspartic proteinase)]] | ||
''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 10:06:31 2008'' | ||
Revision as of 11:06, 20 March 2008
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NATIVE CARDOSIN A FROM CYNARA CARDUNCULUS L.
OverviewOverview
Aspartic proteinases (AP) have been widely studied within the living world, but so far no plant AP have been structurally characterized. The refined cardosin A crystallographic structure includes two molecules, built up by two glycosylated peptide chains (31 and 15 kDa each). The fold of cardosin A is typical within the AP family. The glycosyl content is described by 19 sugar rings attached to Asn-67 and Asn-257. They are localized on the molecular surface away from the conserved active site and show a new glycan of the plant complex type. A hydrogen bond between Gln-126 and Manbeta4 renders the monosaccharide oxygen O-2 sterically inaccessible to accept a xylosyl residue, therefore explaining the new type of the identified plant glycan. The Arg-Gly-Asp sequence, which has been shown to be involved in recognition of a putative cardosin A receptor, was found in a loop between two beta-strands on the molecular surface opposite the active site cleft. Based on the crystal structure, a possible mechanism whereby cardosin A might be orientated at the cell surface of the style to interact with its putative receptor from pollen is proposed. The biological implications of these findings are also discussed.
About this StructureAbout this Structure
1B5F is a Single protein structure of sequence from Cynara cardunculus. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of cardosin A, a glycosylated and Arg-Gly-Asp-containing aspartic proteinase from the flowers of Cynara cardunculus L., Frazao C, Bento I, Costa J, Soares CM, Verissimo P, Faro C, Pires E, Cooper J, Carrondo MA, J Biol Chem. 1999 Sep 24;274(39):27694-701. PMID:10488111
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