Solution structure of MerB, the Organomercurial Lyase involved in the bacterial mercury resistance system
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
| Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| A | d1s6la1 | All alpha proteins | DNA/RNA-binding 3-helical bundle | 'Winged helix' DNA-binding domain | MerB N-terminal domain-like | Alkylmercury lyase MerB | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
| A | d1s6la2 | Alpha and beta proteins (a+b) | NosL/MerB-like | NosL/MerB-like | MerB-like | Alkylmercury lyase MerB | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| A | HTH_15 | e1s6lA1 | A: alpha arrays | X: HTH | H: HTH | T: winged helix domain | F: HTH_15 | ECOD (v294.2) |
| A | MerB | e1s6lA2 | A: a+b two layers | X: NosL/MerB-like | H: NosL/MerB-like | T: NosL/MerB-like | F: MerB | ECOD (v294.2) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| A | 1.10.10.10 | Mainly Alpha | Orthogonal Bundle | Arc Repressor Mutant, subunit A | Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain | CATH (4.3.0) |
| A | 3.15.10.60 | Alpha Beta | Super Roll | Bactericidal permeability-increasing protein | domain 1 | CATH (4.3.0) |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
| Chains | Polymer | Molecular Function | Biological Process | Cellular Component |
|---|---|---|---|---|
| Alkylmercury lyase | - |
InterPro: Protein Family Classification InterPro Database Homepage
| Chains | Accession | Name | Type |
|---|---|---|---|
| IPR024259 | Alkylmercury lyase, helix-turn-helix domain | Domain | |
| IPR004927 | Alkylmercury lyase | Family | |
| IPR036390 | Winged helix DNA-binding domain superfamily | Homologous Superfamily | |
| IPR053717 | Mercury resistance MerB lyase | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
| Chains | Enzyme Name | Description | Catalytic Residues |
|---|---|---|---|
| alkylmercury lyase M-CSA #297 | Mercury is a highly toxic metal. Toxicity can result from three different mercurial forms: elemental, inorganic ion and organomercurial compounds. The ability of bacteria to detoxify mercurial compounds by reduction and volatilisation is conferred by the Mer genes. Organomercurial lyase (MerB), also known as alkylmercury lyase, mediates the first of the two steps in the microbial detoxification of organomercurial salts (the other catalysed by mercuric reductase). It catalyses the protonolysis of the carbon-mercury bond in a wide range of organomercurial salts (primary, secondary, tertiary, alkyl, vinyl, allyl and aryl) to Hg(II) and the respective organic compound [PMID: 10548738]. Hg(II) is subsequently detoxified by mercuric reductase MerA. | EC: 4.99.1.2 (PDB Primary Data) |
