2001
DOI: 10.1021/bi010682i
|View full text |Cite
|
Sign up to set email alerts
|

Molecular Structure of Dihydroorotase:  A Paradigm for Catalysis through the Use of a Binuclear Metal Center,

Abstract: Dihydroorotase plays a key role in pyrimidine biosynthesis by catalyzing the reversible interconversion of carbamoyl aspartate to dihydroorotate. Here we describe the three-dimensional structure of dihydroorotase from Escherichia coli determined and refined to 1.7 A resolution. Each subunit of the homodimeric enzyme folds into a "TIM" barrel motif with eight strands of parallel beta-sheet flanked on the outer surface by alpha-helices. Unexpectedly, each subunit contains a binuclear zinc center with the metal i… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1

Citation Types

19
218
1

Year Published

2002
2002
2017
2017

Publication Types

Select...
5
4

Relationship

1
8

Authors

Journals

citations
Cited by 189 publications
(238 citation statements)
references
References 26 publications
19
218
1
Order By: Relevance
“…However, the zinc-zinc distance of 3.68 Å in HPRG is typical of dinuclear first transition row metal sites with bridging ligands like carboxylates or cysteine thiolate sulfur. Examples of dinuclear zinc sites can be seen in dihydroorotase (34), where two Zn 2ϩ ions, bridged by the carboxylate group of a carbamylated Lys residue, are at 3.48 Å distance. This also occurs in phosphotriesterase where two Zn 2ϩ ions are at 3.45 Å (35).…”
Section: Zinc-binding Site Of Skeletal Muscle Hprgmentioning
confidence: 99%
“…However, the zinc-zinc distance of 3.68 Å in HPRG is typical of dinuclear first transition row metal sites with bridging ligands like carboxylates or cysteine thiolate sulfur. Examples of dinuclear zinc sites can be seen in dihydroorotase (34), where two Zn 2ϩ ions, bridged by the carboxylate group of a carbamylated Lys residue, are at 3.48 Å distance. This also occurs in phosphotriesterase where two Zn 2ϩ ions are at 3.45 Å (35).…”
Section: Zinc-binding Site Of Skeletal Muscle Hprgmentioning
confidence: 99%
“…An additional bridging ligand from the protein may include a carboxylated lysine from the end of β-strand 4, a glutamate from the end of β-strand three or four, or a cysteine from the end of β-strand 2 (8,9). Enzymes of this type include dihydroorotase (12), the phosphotriesterase homology protein (13), renal dipeptidase (14) and D-amino acid deacetylase (15). Many members of the amidohydrolase superfamily bind a single divalent cation, including cytosine (16) and adenosine deaminase (17).…”
mentioning
confidence: 99%
“…Members of this family contain either mononuclear metal sites, such as the zinc site found in adenosine deaminase (56) and the iron site in cytosine deaminase (57), or dinuclear sites, such as the di-nickel site documented to occur in urease (20) and the di-zinc sites of dihydroorotase (47) and hydantoinase (1,2,8). Some, but not all, dinuclear hydrolase family members have their two metals bridged by a carbamylated lysine ligand (1,2,4,7,8,20,47). Significantly, we find that allantoinase sequences align with the active site regions of crystallized hydantoinases (1,2,8), dihydroorotase (47), and urease (20), as well as with a subgroup of hydantoinases that have not been structurally characterized (Fig.…”
mentioning
confidence: 99%