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1bnp

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Revision as of 09:01, 21 May 2019

NMR SOLUTION STRUCTURE OF THE N-TERMINAL DOMAIN OF DNA POLYMERASE BETA, 55 STRUCTURES

Structural highlights

1bnp is a 1 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1bno
Activity:	DNA-directed DNA polymerase, with EC number 2.7.7.7
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[DPOLB_RAT] Repair polymerase that plays a key role in base-excision repair. Has 5'-deoxyribose-5-phosphate lyase (dRP lyase) activity that removes the 5' sugar phosphate and also acts as a DNA polymerase that adds one nucleotide to the 3' end of the arising single-nucleotide gap. Conducts 'gap-filling' DNA synthesis in a stepwise distributive fashion rather than in a processive fashion as for other DNA polymerases.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

DNA polymerase beta (beta-Pol) consists of an N-terminal ssDNA binding domain with deoxyribose phosphodiesterase activity and a C-terminal domain with nucleotidyltransferase activity. The solution structure of the cloned N-terminal domain of beta-Pol has been determined by multidimensional heteronuclear NMR using experimental restraints that included 1030 distances based on analysis of NOE connectivities, 68 phi, chi 1, and chi 2 torsion angles based on analysis of couplings, and 22 hydrogen bonds. Hydrogen bonds were assessed only within helices by the absence of saturation transfer from water at pH 6.7, by NOEs and JNH alpha couplings indicative of well-structured helices, and by 13C alpha chemical shifts characteristic of helices. The root mean square deviation for heavy backbone atoms within the helices was 0.64 A in 55 structures. The solution structure of the N-terminal domain is formed from four helices packed as two antiparallel pairs crossing at 50 degrees in a V-like shape. The domain binds p(dT)8, a template analogue, as a 1:1 complex in 100 mM NaCl (KD = 10 microM). Analysis of the binding equilibria at increasing NaCl concentrations indicated that ionic contacts contribute to the complex. The binding interaction was mapped to one face of the domain by characterizing backbone 1H and 15N chemical shift changes. Assigned intermolecular NOEs from 2D NOESY support the assessment of the binding interface. The structure that forms the interaction surface includes an antiparallel helix-3-turn-helix-4 motif and residues adjacent to an omega-type loop connecting helix-1 and helix-2. Sites appropriate for nucleotide contact on the structure are described. The mapped interaction interface for a ssDNA template is the first described for a DNA polymerase.

Three-dimensional solution structure of the N-terminal domain of DNA polymerase beta and mapping of the ssDNA interaction interface.,Liu D, Prasad R, Wilson SH, DeRose EF, Mullen GP Biochemistry. 1996 May 21;35(20):6188-200. PMID:8639559^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Liu D, Prasad R, Wilson SH, DeRose EF, Mullen GP. Three-dimensional solution structure of the N-terminal domain of DNA polymerase beta and mapping of the ssDNA interaction interface. Biochemistry. 1996 May 21;35(20):6188-200. PMID:8639559 doi:10.1021/bi952656o

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1bnp"

@@ Line 1: / Line 1: @@
 ==NMR SOLUTION STRUCTURE OF THE N-TERMINAL DOMAIN OF DNA POLYMERASE BETA, 55 STRUCTURES==
-<StructureSection load='1bnp' size='340' side='right' caption='[[1bnp]], [[NMR_Ensembles_of_Models | 55 NMR models]]' scene=''>
+<StructureSection load='1bnp' size='340' side='right'caption='[[1bnp]], [[NMR_Ensembles_of_Models | 55 NMR models]]' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1bnp]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BNP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BNP FirstGlance]. <br>
@@ Line 14: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bn/1bnp_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bn/1bnp_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 37: / Line 37: @@
 </StructureSection>
 [[Category: DNA-directed DNA polymerase]]
+[[Category: Large Structures]]
 [[Category: Derose, E F]]
 [[Category: Liu, D J]]

1bnp

From Proteopedia

Revision as of 09:01, 21 May 2019

NMR SOLUTION STRUCTURE OF THE N-TERMINAL DOMAIN OF DNA POLYMERASE BETA, 55 STRUCTURES

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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