1psz
From Proteopedia
(New page: 200px<br /><applet load="1psz" size="450" color="white" frame="true" align="right" spinBox="true" caption="1psz, resolution 2.0Å" /> '''PNEUMOCOCCAL SURFACE ...) |
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| - | [[Image:1psz.gif|left|200px]]<br /><applet load="1psz" size=" | + | [[Image:1psz.gif|left|200px]]<br /><applet load="1psz" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1psz, resolution 2.0Å" /> | caption="1psz, resolution 2.0Å" /> | ||
'''PNEUMOCOCCAL SURFACE ANTIGEN PSAA'''<br /> | '''PNEUMOCOCCAL SURFACE ANTIGEN PSAA'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Background:. The surface protein PsaA of the pathogenic bacterium | + | Background:. The surface protein PsaA of the pathogenic bacterium Streptococcus pneumoniae plays an essential role in its virulence. PsaA is a putative ATP-binding cassette-type (ABC-type) binding protein involved in the uptake of Mn2+ and possibly Zn2+ and is considered to be both a potential drug target and and a candidate vaccine component. Results:. The structure of PsaA has been determined to 2.0 A resolution using X-ray crystallography and is the first structure obtained for an ABC-type binding protein from a Gram-positive organism. The protein consists of two (beta/alpha)4 domains linked together by a single helix. A metal-binding site is formed in the domain interface by the sidechains of His67, His139, Glu205 and Asp280 and is occupied in the structure. Conclusions:. The structural topology of PsaA is fundamentally different from that of other ABC-type binding proteins determined thus far in that PsaA lacks the characteristic 'hinge peptides' involved in conformational change upon solute uptake and release. In our structure, the metal-binding site is probably occupied by Zn2+. The site seems to be well conserved amongst related receptors from both Gram-positive and Gram-negative bacteria. |
==About this Structure== | ==About this Structure== | ||
| - | 1PSZ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae] with ZN as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 1PSZ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae] with <scene name='pdbligand=ZN:'>ZN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PSZ OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Streptococcus pneumoniae]] | [[Category: Streptococcus pneumoniae]] | ||
| - | [[Category: Berry, A | + | [[Category: Berry, A M.]] |
| - | [[Category: Epa, V | + | [[Category: Epa, V C.]] |
| - | [[Category: Lawrence, M | + | [[Category: Lawrence, M C.]] |
| - | [[Category: Ogunniyi, A | + | [[Category: Ogunniyi, A D.]] |
| - | [[Category: Paton, J | + | [[Category: Paton, J C.]] |
| - | [[Category: Pilling, P | + | [[Category: Pilling, P A.]] |
[[Category: ZN]] | [[Category: ZN]] | ||
[[Category: abc-type binding protein]] | [[Category: abc-type binding protein]] | ||
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[[Category: psaa]] | [[Category: psaa]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:32:16 2008'' |
Revision as of 12:32, 21 February 2008
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PNEUMOCOCCAL SURFACE ANTIGEN PSAA
Overview
Background:. The surface protein PsaA of the pathogenic bacterium Streptococcus pneumoniae plays an essential role in its virulence. PsaA is a putative ATP-binding cassette-type (ABC-type) binding protein involved in the uptake of Mn2+ and possibly Zn2+ and is considered to be both a potential drug target and and a candidate vaccine component. Results:. The structure of PsaA has been determined to 2.0 A resolution using X-ray crystallography and is the first structure obtained for an ABC-type binding protein from a Gram-positive organism. The protein consists of two (beta/alpha)4 domains linked together by a single helix. A metal-binding site is formed in the domain interface by the sidechains of His67, His139, Glu205 and Asp280 and is occupied in the structure. Conclusions:. The structural topology of PsaA is fundamentally different from that of other ABC-type binding proteins determined thus far in that PsaA lacks the characteristic 'hinge peptides' involved in conformational change upon solute uptake and release. In our structure, the metal-binding site is probably occupied by Zn2+. The site seems to be well conserved amongst related receptors from both Gram-positive and Gram-negative bacteria.
About this Structure
1PSZ is a Single protein structure of sequence from Streptococcus pneumoniae with as ligand. Full crystallographic information is available from OCA.
Reference
The crystal structure of pneumococcal surface antigen PsaA reveals a metal-binding site and a novel structure for a putative ABC-type binding protein., Lawrence MC, Pilling PA, Epa VC, Berry AM, Ogunniyi AD, Paton JC, Structure. 1998 Dec 15;6(12):1553-61. PMID:9862808
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