View source for 1hqb


==TERTIARY STRUCTURE OF APO-D-ALANYL CARRIER PROTEIN==
<StructureSection load='1hqb' size='340' side='right'caption='[[1hqb]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1hqb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Lacticaseibacillus_casei Lacticaseibacillus casei]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HQB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HQB FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1hqb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hqb OCA], [https://pdbe.org/1hqb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hqb RCSB], [https://www.ebi.ac.uk/pdbsum/1hqb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hqb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/DLTC_LACP3 DLTC_LACP3] Carrier protein involved in the D-alanylation of lipoteichoic acid (LTA). The loading of thioester-linked D-alanine onto DltC is catalyzed by D-alanine--D-alanyl carrier protein ligase DltA. The DltC-carried D-alanyl group is further transferred to cell membrane phosphatidylglycerol (PG) by forming an ester bond, probably catalyzed by DltD. D-alanylation of LTA plays an important role in modulating the properties of the cell wall in Gram-positive bacteria, influencing the net charge of the cell wall.[HAMAP-Rule:MF_00565]
== 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/hq/1hqb_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=1hqb ConSurf].
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== Publication Abstract from PubMed ==
The D-alanylation of lipoteichoic acid (LTA) allows the Gram-positive organism to modulate its surface charge, regulate ligand binding, and control the electromechanical properties of the cell wall. The incorporation of D-alanine into LTA requires the D-alanine:D-alanyl carrier protein ligase (AMP-forming) (Dcl) and the carrier protein (Dcp). The high-resolution solution structure of the 81-residue (8.9 kDa) Dcp has been determined by multidimensional heteronuclear NMR. An ensemble of 30 structures was calculated using the torsion angle dynamics approach of DYANA. These calculations utilized 3288 NOEs containing 1582 unique nontrivial NOE distance constraints. Superposition of residues 4-81 on the mean structure yields average atomic rmsd values of 0.43 +/- 0.08 and 0.86 +/- 0.09 A for backbone and non-hydrogen atoms, respectively. The solution structure is composed of three alpha-helices in a bundle with additional short 3(10)- and alpha-helices in intervening loops. Comparisons of the three-dimensional structure with the acyl carrier proteins involved in fatty acid, polyketide, and nonribosomal peptide syntheses support the conclusion that Dcp is a homologue in this family. While there is conservation of the three-helix bundle fold, Dcp has a higher enthalpy of unfolding and no apparent divalent metal binding site(s), features that distinguish it from the fatty acid synthase acyl carrier protein of Escherichia coli. This three-dimensional structure also provides insights into the D-alanine ligation site recognized by Dcl, as well as the site which may bind the poly(glycerophosphate) acceptor moiety of membrane-associated LTA.

Biosynthesis of D-alanyl-lipoteichoic acid: the tertiary structure of apo-D-alanyl carrier protein.,Volkman BF, Zhang Q, Debabov DV, Rivera E, Kresheck GC, Neuhaus FC Biochemistry. 2001 Jul 10;40(27):7964-72. PMID:11434765<ref>PMID:11434765</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: Lacticaseibacillus casei]]
[[Category: Large Structures]]
[[Category: Debabov DV]]
[[Category: Kresheck G]]
[[Category: Neuhaus FC]]
[[Category: Rivera E]]
[[Category: Volkman BF]]
[[Category: Zhang Q]]