Annotations: 3A3B

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	V-set	e3a3bA5	A: beta barrels	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v294.2)
A [auth B]	Copper-bind	e3a3bB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Copper-bind	ECOD (v294.2)
A [auth B]	V-set	e3a3bB3	A: beta barrels	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v294.2)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	2.40.30.20	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (4.3.0)
A [auth B]	2.40.30.20	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (4.3.0)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	Lumazine protein	binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding riboflavin synthase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity	water-soluble vitamin biosynthetic process small molecule biosynthetic process flavin-containing compound metabolic process vitamin biosynthetic process riboflavin biosynthetic process vitamin metabolic process flavin-containing compound biosynthetic process biosynthetic process metabolic process cellular process small molecule metabolic process riboflavin metabolic process	-

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR017938	Riboflavin synthase-like beta-barrel	Homologous Superfamily
A [auth B], B [auth A]	IPR026017	Lumazine-binding domain	Domain
A [auth B], B [auth A]	IPR001783	Lumazine-binding protein	Family
A [auth B], B [auth A]	IPR023366	ATP synthase subunit alpha, N-terminal domain-like superfamily	Homologous Superfamily

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.

3A3B | pdb_00003a3b