View source for 2ker


==alpha-amylase inhibitor Parvulustat (Z-2685) from Streptomyces parvulus==
<StructureSection load='2ker' size='340' side='right'caption='[[2ker]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2ker]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_12434 Atcc 12434]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KER OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KER FirstGlance]. <br>
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ker FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ker OCA], [https://pdbe.org/2ker PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ker RCSB], [https://www.ebi.ac.uk/pdbsum/2ker PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ker ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/IAA_STRRO IAA_STRRO]] Inhibits mammalian alpha-amylases specifically but has no action on plant and microbial alpha-amylases. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ke/2ker_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2ker ConSurf].
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== Publication Abstract from PubMed ==
The protein parvulustat (Z-2685) from Streptomyces parvulus comprises 78 amino acids and functions as a highly efficient alpha-amylase inhibitor. Parvulustat shares 29.6 % overall amino acid sequence identity to the well-known alpha-amylase inhibitor tendamistat. Among the conserved residues are the two disulfide bridges (C9-C25, C43-C70) and the active-site motif (W16, R17, Y18). Here, we report the high-resolution NMR structure of parvulustat based on NOEs, J couplings, chemical shifts and hydrogen-exchange data. In addition, we studied the dynamical properties of parvulustat by heteronuclear relaxation measurements. We compare the structure of parvulustat with the structure of tendamistat in terms of secondary structure elements, charges and hydrophobicity. The overall structural composition is very similar, but there are distinct differences including the active-site region. These structural and dynamical differences indicate that for parvulustat an induced-fit mechanism for binding to alpha-amylase might take place, since the structure of tendamistat does not change upon binding to alpha-amylase.

The high resolution NMR structure of parvulustat (Z-2685) from Streptomyces parvulus FH-1641: comparison with tendamistat from Streptomyces tendae 4158.,Rehm S, Han S, Hassani I, Sokocevic A, Jonker HR, Engels JW, Schwalbe H Chembiochem. 2009 Jan 5;10(1):119-27. PMID:19067455<ref>PMID:19067455</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Atcc 12434]]
[[Category: Large Structures]]
[[Category: Engels, J W]]
[[Category: Han, S]]
[[Category: Hassani, I]]
[[Category: Jonker, H R.A]]
[[Category: Rehm, S]]
[[Category: Schwalbe, H]]
[[Category: Sokocevic, A]]
[[Category: Alpha-amylase inhibitor]]
[[Category: Hydrolase inhibitor]]