Annotations: 6XGY

Crystal structure of E. coli MlaFB ABC transport subunits in the dimeric state

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	ABC transporter ATPase domain-like	8101774	4003976	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	ABC transporter-like P-loop ATPases	8101775	3002020	SCOP2 (2022-06-29)
A	SCOP2B Superfamily	ABC transporter-like P-loop ATPases	8100896	3002020	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B		e6xgyB1	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)
A		e6xgyA1	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)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.750.24	Alpha Beta	2-Layer Sandwich	Transcription Regulator spoIIAA	STAS domain	CATH (utative)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF13466	Mlab, STAS domain (STAS_2)	Mlab, STAS domain	This entry represents the STAS domain in MlaB and related proteins found in bacteria. MlaB is a component of the ABC transporter complex MlaFEDB, which functions in a phospholipid transport pathway that maintains lipid asymmetry in the outer membrane ...	This entry represents the STAS domain in MlaB and related proteins found in bacteria. MlaB is a component of the ABC transporter complex MlaFEDB, which functions in a phospholipid transport pathway that maintains lipid asymmetry in the outer membrane by facilitating the retrograde trafficking of phospholipids from the outer membrane to the inner membrane [1]. MlaB plays a critical role in both the assembly and activity of the complex and may modulate the structure and stability of the ATPase subunit MlaF [2].	Domain
A	PF00005	ABC transporter (ABC_tran)	ABC transporter	ABC transporters for a large family of proteins responsible for translocation of a variety of compounds across biological membranes. ABC transporters are the largest family of proteins in many completely sequenced bacteria. ABC transporters are comp ...	ABC transporters for a large family of proteins responsible for translocation of a variety of compounds across biological membranes. ABC transporters are the largest family of proteins in many completely sequenced bacteria. ABC transporters are composed of two copies of this domain and two copies of a transmembrane domain Pfam:PF00664. These four domains may belong to a single polypeptide as in Swiss:P13569, or belong in different polypeptide chains.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	ABC transporter maintaining OM lipid asymmetry, cytoplasmic STAS component	lipid carrier activity phospholipid transfer activity lipid transfer activity transporter activity molecular carrier activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process localization transport macromolecule localization phospholipid transport lipid localization lipid transport establishment of localization organophosphate ester transport cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process localization transport macromolecule localization phospholipid transport lipid localization lipid transport establishment of localization organophosphate ester transport response to chemical response to antibiotic membrane organization intermembrane lipid transfer cellular component organization intermembrane phospholipid transfer cellular component organization or biogenesis	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol phospholipid-translocating ATPase complex protein-containing complex transporter complex membrane
A	Organic solvent ABC transporter ATP-binding protein	lipid carrier activity phospholipid transfer activity lipid transfer activity transporter activity molecular carrier activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding lipid carrier activity phospholipid transfer activity lipid transfer activity transporter activity molecular carrier activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding pyrophosphatase activity ATP hydrolysis activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity ATP-dependent activity	localization transport macromolecule localization phospholipid transport lipid localization lipid transport establishment of localization organophosphate ester transport membrane organization intermembrane lipid transfer cellular component organization intermembrane phospholipid transfer cellular process cellular component organization or biogenesis	cell periphery cellular anatomical structure plasma membrane membrane phospholipid-translocating ATPase complex protein-containing complex transporter complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR036513	STAS domain superfamily	Homologous Superfamily
B	IPR002645	STAS domain	Domain
B	IPR049743	Intermembrane phospholipid transport system binding protein MlaB	Family
B	IPR052746	MlaB ABC Transporter Complex Protein	Family
A	IPR003593	AAA+ ATPase domain	Domain
A	IPR017871	ABC transporter-like, conserved site	Conserved Site
A	IPR003439	ABC transporter-like, ATP-binding domain	Domain
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Mammalian Cell Entry (MCE) Proteins	MlaFB component of MlaFEDB ABC transporter complex (dimer)

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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.