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[[Image:1qj5.jpg|left|200px]]


{{Structure
==Crystal structure of 7,8-diaminopelargonic acid synthase==
|PDB= 1qj5 |SIZE=350|CAPTION= <scene name='initialview01'>1qj5</scene>, resolution 1.8&Aring;
<StructureSection load='1qj5' size='340' side='right'caption='[[1qj5]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
|SITE= <scene name='pdbsite=LL1:Pyridoxal-5&#39;-Phosphate+Binding+Site'>LL1</scene> and <scene name='pdbsite=LL2:Pyridoxal-5&#39;-Phosphate+Binding+Site'>LL2</scene>
== Structural highlights ==
|LIGAND= <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5&#39;-PHOSPHATE'>PLP</scene>
<table><tr><td colspan='2'>[[1qj5]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_BL21(DE3) Escherichia coli BL21(DE3)]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QJ5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QJ5 FirstGlance]. <br>
|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenosylmethionine--8-amino-7-oxononanoate_transaminase Adenosylmethionine--8-amino-7-oxononanoate transaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.62 2.6.1.62] </span>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8&#8491;</td></tr>
|GENE= BIOA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene></td></tr>
|DOMAIN=
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1qj5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qj5 OCA], [https://pdbe.org/1qj5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1qj5 RCSB], [https://www.ebi.ac.uk/pdbsum/1qj5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1qj5 ProSAT]</span></td></tr>
|RELATEDENTRY=
</table>
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qj5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qj5 OCA], [http://www.ebi.ac.uk/pdbsum/1qj5 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1qj5 RCSB]</span>
== Function ==
}}
[https://www.uniprot.org/uniprot/BIOA_ECOLI BIOA_ECOLI] Catalyzes the transfer of the alpha-amino group from S-adenosyl-L-methionine (SAM) to 7-keto-8-aminopelargonic acid (KAPA) to form 7,8-diaminopelargonic acid (DAPA). It is the only animotransferase known to utilize SAM as an amino donor.<ref>PMID:1092681</ref>
== 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/qj/1qj5_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=1qj5 ConSurf].
<div style="clear:both"></div>


'''CRYSTAL STRUCTURE OF 7,8-DIAMINOPELARGONIC ACID SYNTHASE'''
==See Also==
 
*[[7%2C8-diaminopelargonic acid synthase 3D structures|7%2C8-diaminopelargonic acid synthase 3D structures]]
 
== References ==
==Overview==
<references/>
The three-dimensional structure of diaminopelargonic acid synthase, a vitamin B6-dependent enzyme in the pathway of the biosynthesis of biotin, has been determined to 1.8 A resolution by X-ray crystallography. The structure was solved by multi-wavelength anomalous diffraction techniques using a crystal derivatized with mercury ions. The protein model has been refined to a crystallographic R -value of 17.5% (R -free 22.6%). Each enzyme subunit consists of two domains, a large domain (residues 50-329) containing a seven-stranded predominantly parallel beta-sheet, surrounded by alpha-helices, and a small domain comprising residues 1-49 and 330-429. Two subunits, related by a non-crystallographic dyad in the crystals, form the homodimeric molecule, which contains two equal active sites. Pyridoxal-5'-phosphate is bound in a cleft formed by both domains of one subunit and the large domain of the second subunit. The cofactor is anchored to the enzyme by a covalent linkage to the side-chain of the invariant residue Lys274. The phosphate group interacts with main-chain nitrogen atoms and the side-chain of Ser113, located at the N terminus of an alpha-helix. The pyridine nitrogen forms a hydrogen bond to the side-chain of the invariant residue Asp245. Electron density corresponding to a metal ion, most likely Na(+), was found in a tight turn at the surface of the enzyme. Structure analysis reveals that diaminopelargonic acid synthase belongs to the family of vitamin B6-dependent aminotransferases with the same fold as originally observed in aspartate aminotransferase. A multiple structure alignment of enzymes in this family indicated that they form at least six different subclasses. Striking differences in the fold of the N-terminal part of the polypeptide chain are one of the hallmarks of these subclasses. Diaminopelargonic acid synthase is a member of the aminotransferase subclass III. From the structure of the non-productive complex of the holoenzyme with the substrate 7-keto-8-aminopelargonic acid the location of the active site and residues involved in substrate binding have been identified.
__TOC__
 
</StructureSection>
==About this Structure==
[[Category: Large Structures]]
1QJ5 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QJ5 OCA].
[[Category: Gibson KJ]]
 
[[Category: Kack H]]
==Reference==
[[Category: Lindqvist Y]]
Crystal structure of diaminopelargonic acid synthase: evolutionary relationships between pyridoxal-5'-phosphate-dependent enzymes., Kack H, Sandmark J, Gibson K, Schneider G, Lindqvist Y, J Mol Biol. 1999 Aug 27;291(4):857-76. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10452893 10452893]
[[Category: Sandmark J]]
[[Category: Adenosylmethionine--8-amino-7-oxononanoate transaminase]]
[[Category: Schneider G]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Gibson, K J.]]
[[Category: Kack, H.]]
[[Category: Lindqvist, Y.]]
[[Category: Sandmark, J.]]
[[Category: Schneider, G.]]
[[Category: aminotransferase]]
[[Category: biotin biosynthesis]]
[[Category: pyridoxal-5'-phosphate]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:14:31 2008''

Latest revision as of 09:03, 17 April 2024

Crystal structure of 7,8-diaminopelargonic acid synthaseCrystal structure of 7,8-diaminopelargonic acid synthase

Structural highlights

1qj5 is a 2 chain structure with sequence from Escherichia coli BL21(DE3). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.8Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

BIOA_ECOLI Catalyzes the transfer of the alpha-amino group from S-adenosyl-L-methionine (SAM) to 7-keto-8-aminopelargonic acid (KAPA) to form 7,8-diaminopelargonic acid (DAPA). It is the only animotransferase known to utilize SAM as an amino donor.[1]

Evolutionary Conservation

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

See Also

References

  1. ↑ Stoner GL, Eisenberg MA. Purification and properties of 7, 8-diaminopelargonic acid aminotransferase. J Biol Chem. 1975 Jun 10;250(11):4029-36. PMID:1092681

1qj5, resolution 1.80Å

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