Annotations: 2DE2

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	SBP_bac_1	e2de2A1	A: alpha arrays	X: Alpha-lytic protease prodomain-like	H: Glycosyl hydrolase domain	T: Glycosyl hydrolase domain	F: SBP_bac_1	ECOD (v295.2)
A		e2de2A2	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.190.10	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)
A	3.40.190.270	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DIBENZOTHIOPHENE DESULFURIZATION ENZYME B	monooxygenase activity oxidoreductase activity catalytic activity 2'-hydroxybiphenyl-2-sulfinate desulfinase activity hydrolase activity hydrolase activity, acting on carbon-sulfur bonds	cellular response to stimulus catabolic process response to stimulus dibenzothiophene catabolic process cellular response to xenobiotic stimulus xenobiotic catabolic process xenobiotic metabolic process response to xenobiotic stimulus sulfur compound catabolic process cellular response to chemical stimulus response to chemical sulfur compound metabolic process metabolic process cellular process	cellular anatomical structure intracellular anatomical structure cytoplasm

Chains	Enzyme Name	Description	Catalytic Residues
A	2'-hydroxybiphenyl-2-sulfinate desulfinase M-CSA #971	Part of a bacerial 4S pathway that removes covalently bound sulfur from dibenzothiophene (DBT) without breaking carbon-carbon bonds. This enzymatic system employs four different enzymes (DszA, DszB, DszC, and DszD) to work sequentially in order to oxidize the C−S bond and remove the oxidized sulfur as HSO₃^-. Bacteria use the oxidized sulfur for their anabolic needs such as producing sulfur-containing amino acids. DszB naturally metabolizes 2′-hydroxybiphenyl-2-sulfinate (HBPS) into biphenyl-2-ol without using cofactors. This reaction might be useful in the future for the processing of crude oil in a more environmentally friendly and lucrative way.	Defined by 5 residues: SER:A-25CYS:A-27HIS:A-60ARG:A-70GLY:A-73 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.13.1.3 (PDB Primary Data) Search M-CSA Motif + EC 3.13.1.3

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

2DE2 | pdb_00002de2