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

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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	SIMPL	e6xgyB1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: SIMPL	ECOD (v294.2)
A	SIMPL	e6xgyA1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: SIMPL	ECOD (v294.2)

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

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 response to chemical response to antibiotic localization transport macromolecule localization phospholipid transport lipid localization lipid transport cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process response to chemical response to antibiotic 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 component organization or biogenesis	cellular anatomical structure membrane intracellular anatomical structure cytoplasm cytosol phospholipid-translocating ATPase complex protein-containing complex transporter complex
A	Organic solvent ABC transporter ATP-binding protein	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR058548	MlaB-like_STAS	Unknown
B	IPR002645	STAS domain	Domain
B	IPR049743	Intermembrane phospholipid transport system binding protein MlaB	Family
B	IPR052746	MlaB ABC Transporter Complex Protein	Family
B	IPR036513	STAS domain superfamily	Homologous Superfamily

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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.