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| - | [[Image:1m5m.gif|left|200px]]<br /> | + | #REDIRECT [[3gxz]] This PDB entry is obsolete and replaced by 3gxz |
| - | <applet load="1m5m" size="450" color="white" frame="true" align="right" spinBox="true"
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| - | caption="1m5m, resolution 2.50Å" />
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| - | '''CRYSTAL STRUCTURE OF CYANOVIRIN-N COMPLEXED TO OLIGOMANNOSE-9 (MAN-9)'''<br />
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| - | ==Overview==
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| - | The development of anti-human immunodeficiency virus (HIV) microbicides, for either topical or ex vivo use is of considerable interest, mainly due, to the difficulties in creating a vaccine that would be active against, multiple clades of HIV. Cyanovirin-N (CV-N), an 11-kDa protein from the, cyanobacterium (blue-green algae) Nostoc ellipsosporum with potent, virucidal activity, was identified in the search for such antiviral, agents. The binding of CV-N to the heavily glycosylated HIV envelope, protein gp120 is carbohydrate-dependent. Since previous CV-N-dimannose, structures could not fully explain CV-N-oligomannose binding, we, determined the crystal structures of recombinant CV-N complexed to Man-9, and a synthetic hexamannoside, at 2.5- and 2.4-A resolution, respectively., CV-N is a three-dimensional domain-swapped dimer in the crystal structures, with two primary sites near the hinge region and two secondary sites on, the opposite ends of the dimer. The binding interface is constituted of, three stacked alpha1-->2-linked mannose rings for Man-9 and two stacked, mannose rings for hexamannoside with the rest of the saccharide molecules, pointing to the solution. These structures show unequivocally the binding, geometry of high mannose sugars to CV-N, permitting a better understanding, of carbohydrate binding to this potential new lead for the design of drugs, against AIDS.
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| - | ==About this Structure==
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| - | 1M5M is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Nostoc_ellipsosporum Nostoc ellipsosporum] with NHE as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1M5M OCA].
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| - | ==Reference==
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| - | Structures of the complexes of a potent anti-HIV protein cyanovirin-N and high mannose oligosaccharides., Botos I, O'Keefe BR, Shenoy SR, Cartner LK, Ratner DM, Seeberger PH, Boyd MR, Wlodawer A, J Biol Chem. 2002 Sep 13;277(37):34336-42. Epub 2002 Jul 10. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12110688 12110688]
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| - | [[Category: Nostoc ellipsosporum]]
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| - | [[Category: Single protein]]
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| - | [[Category: Botos, I.]]
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| - | [[Category: Boyd, M.R.]]
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| - | [[Category: Cartner, L.K.]]
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| - | [[Category: Keefe, B.R.O.]]
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| - | [[Category: Ratner, D.M.]]
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| - | [[Category: Seeberger, P.H.]]
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| - | [[Category: Shenoy, S.R.]]
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| - | [[Category: Wlodawer, A.]]
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| - | [[Category: NHE]]
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| - | [[Category: cyanovirin-n]]
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| - | [[Category: domain-swapping]]
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| - | [[Category: gp120]]
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| - | [[Category: hexamannoside]]
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| - | [[Category: hiv-inactivating]]
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| - | [[Category: oligosaccharide]]
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| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Thu Nov 8 14:18:38 2007''
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