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2ggk

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Revision as of 11:14, 27 March 2020

The mutant A302C of Agrobacterium radiobacter N-carbamoyl-D-amino-acid amidohydrolase

Structural highlights

2ggk is a 4 chain structure with sequence from "achromobacter_radiobacter"_(beijerinck_and_van_delden_1902)_bergey_et_al._1934 "achromobacter radiobacter" (beijerinck and van delden 1902) bergey et al. 1934. This structure supersedes the now removed PDB entries 2fkv and 2ba5. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1fo6, 2ggl
Activity:	N-carbamoyl-D-amino-acid hydrolase, with EC number 3.5.1.77
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[DCAS_RHIRD] The enzyme catalyzes the hydrolysis of N-carbamoyl-D-amino acids to the corresponding which are useful intermediates in the preparation of beta-lactam antibiotics. Industrial production of beta-lactam antibiotics is now being developed using this enzyme.

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

N-Acylamino acid racemase (NAAAR) and N-carbamoyl-D-amino-acid amidohydrolase (D-NCAase) are important biocatalysts for producing enantiopure alpha-amino acids. NAAAR forms an octameric assembly and displays induced fit movements upon substrate binding, while D-NCAase is a tetramer that does not change conformation in the presence of a ligand. To investigate the effects of introducing potentially stabilizing S-S bridges in these different multimeric enzymes, cysteine residues predicted to form inter or intra-subunit disulfide bonds were introduced by site-directed mutagenesis. Inter-subunit S-S bonds were formed in two NAAAR variants (A68C-D72C and P60C-Y100C) and two d-NCAase variants (A302C and P295C-F304C). Intra-subunit S-S bonds were formed in two additional NAAAR variants (E149C-A182C and V265C). Crystal structures of NAAARs variants show limited deviations from the wild-type overall tertiary structure. An apo A68C-D72C subunit differs from the wild-type enzyme, in which it has an ordered lid loop, resembling ligand-bound NAAAR. The structures of A222C and A302C D-NCAases are nearly identical to the wild-type enzyme. All mutants with inter-subunit bridges had increases in thermostability. Compared with the wild-type enzyme, A68C-D72C NAAAR showed similar kcat/Km ratios, whereas mutant D-NCAases demonstrated increased kcat/Km ratios at high temperatures (A302C: 4.2-fold at 65 degrees C). Furthermore, molecular dynamic simulations reveal that A302C substantially sustains the fine-tuned catalytic site as temperature increases, achieving enhanced activity.

Structure-stability-activity relationship in covalently cross-linked N-carbamoyl D-amino acid amidohydrolase and N-acylamino acid racemase.,Chiu WC, You JY, Liu JS, Hsu SK, Hsu WH, Shih CH, Hwang JK, Wang WC J Mol Biol. 2006 Jun 9;359(3):741-53. Epub 2006 Apr 18. PMID:16650857^[1]

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

References

↑ Chiu WC, You JY, Liu JS, Hsu SK, Hsu WH, Shih CH, Hwang JK, Wang WC. Structure-stability-activity relationship in covalently cross-linked N-carbamoyl D-amino acid amidohydrolase and N-acylamino acid racemase. J Mol Biol. 2006 Jun 9;359(3):741-53. Epub 2006 Apr 18. PMID:16650857 doi:http://dx.doi.org/10.1016/j.jmb.2006.03.063

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2ggk"

@@ Line 1: / Line 1: @@
 ==The mutant A302C of Agrobacterium radiobacter N-carbamoyl-D-amino-acid amidohydrolase==
-<StructureSection load='2ggk' size='340' side='right' caption='[[2ggk]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
+<StructureSection load='2ggk' size='340' side='right'caption='[[2ggk]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2ggk]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"achromobacter_radiobacter"_(beijerinck_and_van_delden_1902)_bergey_et_al._1934 "achromobacter radiobacter" (beijerinck and van delden 1902) bergey et al. 1934]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2fkv 2fkv] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2ba5 2ba5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GGK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2GGK FirstGlance]. <br>
@@ Line 33: / Line 33: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: N-carbamoyl-D-amino-acid hydrolase]]
 [[Category: Chiu, W C]]

2ggk

From Proteopedia

Revision as of 11:14, 27 March 2020

The mutant A302C of Agrobacterium radiobacter N-carbamoyl-D-amino-acid amidohydrolase

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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