Annotations: 7ULA

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	Sel1	e7ulaB1	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: Sel1	ECOD (1.6)
B [auth A]	CBM_26	e7ulaA1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: CBM_26	ECOD (1.6)
B [auth A]	ALGX	e7ulaA2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: SGNH hydrolase (From Topology)	T: SGNH hydrolase	F: ALGX	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B]	PF08238	Sel1 repeat (Sel1)	Sel1 repeat	-	Repeat
B [auth A]	PF16822	SGNH hydrolase-like domain, acetyltransferase AlgX (ALGX)	SGNH hydrolase-like domain, acetyltransferase AlgX	ALGX is a family found in bacteria. The domain demonstrates catalytic activity similar to that of the SGNH hydrolase-like domain, with the typical Ser-His-Asp triad found in this enzyme. Alginate is an exopolysaccharide that contributes to biofilm fo ...	ALGX is a family found in bacteria. The domain demonstrates catalytic activity similar to that of the SGNH hydrolase-like domain, with the typical Ser-His-Asp triad found in this enzyme. Alginate is an exopolysaccharide that contributes to biofilm formation. ALGX is secreted into the biofilm and is responsible for the acetylation of biofilm polymers that help protect them from host destruction [1].	Domain
B [auth A]	PF16824	C-terminal carbohydrate-binding module (CBM_26)	C-terminal carbohydrate-binding module	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	Alginate biosynthesis protein AlgK	-	carbohydrate metabolic process alginic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process polysaccharide biosynthetic process carbohydrate biosynthetic process carboxylic acid metabolic process alginic acid metabolic process primary metabolic process organic acid biosynthetic process organic acid metabolic process macromolecule biosynthetic process carboxylic acid biosynthetic process polysaccharide metabolic process biosynthetic process carbohydrate metabolic process alginic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process polysaccharide biosynthetic process carbohydrate biosynthetic process carboxylic acid metabolic process alginic acid metabolic process primary metabolic process organic acid biosynthetic process organic acid metabolic process macromolecule biosynthetic process carboxylic acid biosynthetic process polysaccharide metabolic process biosynthetic process small molecule metabolic process metabolic process cellular process macromolecule metabolic process	cell periphery cell outer membrane cellular anatomical structure external encapsulating structure membrane cell envelope outer membrane
B [auth A]	Alginate biosynthesis protein AlgX	acyltransferase activity transferase activity catalytic activity	carbohydrate metabolic process alginic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process polysaccharide biosynthetic process carbohydrate biosynthetic process carboxylic acid metabolic process alginic acid metabolic process primary metabolic process organic acid biosynthetic process organic acid metabolic process macromolecule biosynthetic process carboxylic acid biosynthetic process polysaccharide metabolic process biosynthetic process carbohydrate metabolic process alginic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process polysaccharide biosynthetic process carbohydrate biosynthetic process carboxylic acid metabolic process alginic acid metabolic process primary metabolic process organic acid biosynthetic process organic acid metabolic process macromolecule biosynthetic process carboxylic acid biosynthetic process polysaccharide metabolic process biosynthetic process small molecule metabolic process metabolic process cellular process macromolecule metabolic process	cellular anatomical structure periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B]	IPR050767	Sel1/AlgK	Family
A [auth B]	IPR053440	Alginate biosynthesis AlgK	Family
A [auth B]	IPR011990	Tetratricopeptide-like helical domain superfamily	Homologous Superfamily
A [auth B]	IPR006597	Sel1-like repeat	Repeat
B [auth A]	IPR031811	AlgX/AlgJ, SGNH hydrolase-like domain	Domain
B [auth A]	IPR034655	Alginate biosynthesis protein AlgX, N-terminal	Domain
B [auth A]	IPR038639	AlgX, C-terminal domain superfamily	Homologous Superfamily
B [auth A]	IPR031798	Alginate biosynthesis protein AlgX, C-terminal carbohydrate-binding module	Domain

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth B], B [auth A]	mpstruc	TRANSMEMBRANE PROTEINS: BETA-BARREL	Beta-Barrel Membrane Proteins: Monomeric/Dimeric	AlgK–AlgX alginate export protein complex

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.