6IOL | pdb_00006iol

Cryo-EM structure of multidrug efflux pump MexAB-OprM (60 degree state)

External Resource: Annotation

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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
I [auth C]	SCOP2B Superfamily	Outer membrane efflux proteins (OEP)	8043654	3000246	SCOP2B (2022-06-29)
H [auth B]	SCOP2B Superfamily	Outer membrane efflux proteins (OEP)	8043654	3000246	SCOP2B (2022-06-29)
G [auth A]	SCOP2B Superfamily	Outer membrane efflux proteins (OEP)	8043654	3000246	SCOP2B (2022-06-29)
F [auth N]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
F [auth N]	SCOP2B Superfamily	HlyD C-terminal domain-like	8092210	3002572	SCOP2B (2022-06-29)
F [auth N]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
F [auth N]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
F [auth N]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
E [auth M]	SCOP2B Superfamily	HlyD C-terminal domain-like	8092210	3002572	SCOP2B (2022-06-29)
E [auth M]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
E [auth M]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
E [auth M]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
E [auth M]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
D [auth L]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
D [auth L]	SCOP2B Superfamily	HlyD C-terminal domain-like	8092210	3002572	SCOP2B (2022-06-29)
D [auth L]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
D [auth L]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
D [auth L]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
C [auth K]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
C [auth K]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
C [auth K]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
C [auth K]	SCOP2B Superfamily	HlyD C-terminal domain-like	8092210	3002572	SCOP2B (2022-06-29)
C [auth K]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
B [auth J]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
B [auth J]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
B [auth J]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
B [auth J]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
B [auth J]	SCOP2B Superfamily	HlyD C-terminal domain-like	8092210	3002572	SCOP2B (2022-06-29)
A [auth I]	SCOP2B Superfamily	HlyD C-terminal domain-like	8092210	3002572	SCOP2B (2022-06-29)
A [auth I]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	SCOP2B (2022-06-29)
A [auth I]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
A [auth I]	SCOP2B Superfamily	Single hybrid motif	8055550	3001880	SCOP2B (2022-06-29)
A [auth I]	SCOP2B Superfamily	HlyD beta-barrel domain-like	8041312	3002000	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)
J [auth F]	ACR_tran_4th	e6iolF5	A: alpha bundles	X: Multidrug efflux transporter AcrB transmembrane domain (From Topology)	H: Multidrug efflux transporter AcrB transmembrane domain (From Topology)	T: Multidrug efflux transporter AcrB transmembrane domain	F: ACR_tran_4th	ECOD (1.6)
J [auth F]	ACR_tran_1st	e6iolF4	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_1st	ECOD (1.6)
J [auth F]	ACR_tran_5th	e6iolF7	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_5th	ECOD (1.6)
J [auth F]	ACR_tran_3rd	e6iolF2	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_3rd	ECOD (1.6)
J [auth F]	ACR_tran_6th	e6iolF3	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_6th	ECOD (1.6)
J [auth F]	ACR_tran_2nd	e6iolF8	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB TolC docking domain	F: ACR_tran_2nd	ECOD (1.6)
J [auth F]	ACR_tran_6th_1	e6iolF1	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB TolC docking domain	F: ACR_tran_6th_1	ECOD (1.6)
K [auth G]	ACR_tran_4th	e6iolG7	A: alpha bundles	X: Multidrug efflux transporter AcrB transmembrane domain (From Topology)	H: Multidrug efflux transporter AcrB transmembrane domain (From Topology)	T: Multidrug efflux transporter AcrB transmembrane domain	F: ACR_tran_4th	ECOD (1.6)
K [auth G]	ACR_tran_1st	e6iolG6	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_1st	ECOD (1.6)
K [auth G]	ACR_tran_5th	e6iolG4	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_5th	ECOD (1.6)
K [auth G]	ACR_tran_3rd	e6iolG5	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_3rd	ECOD (1.6)
K [auth G]	ACR_tran_6th	e6iolG1	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_6th	ECOD (1.6)
K [auth G]	ACR_tran_2nd	e6iolG8	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB TolC docking domain	F: ACR_tran_2nd	ECOD (1.6)
K [auth G]	ACR_tran_6th_1	e6iolG2	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB TolC docking domain	F: ACR_tran_6th_1	ECOD (1.6)
L [auth E]	ACR_tran_4th	e6iolE7	A: alpha bundles	X: Multidrug efflux transporter AcrB transmembrane domain (From Topology)	H: Multidrug efflux transporter AcrB transmembrane domain (From Topology)	T: Multidrug efflux transporter AcrB transmembrane domain	F: ACR_tran_4th	ECOD (1.6)
L [auth E]	ACR_tran_1st	e6iolE6	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_1st	ECOD (1.6)
L [auth E]	ACR_tran_5th	e6iolE5	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_5th	ECOD (1.6)
L [auth E]	ACR_tran_3rd	e6iolE3	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_3rd	ECOD (1.6)
L [auth E]	ACR_tran_6th	e6iolE4	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB pore domain	F: ACR_tran_6th	ECOD (1.6)
L [auth E]	ACR_tran_2nd	e6iolE1	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB TolC docking domain	F: ACR_tran_2nd	ECOD (1.6)
L [auth E]	ACR_tran_6th_1	e6iolE2	A: a+b two layers	X: Alpha-beta plaits	H: Ferredoxin domains in multidrug efflux transporter	T: Multidrug efflux transporter AcrB TolC docking domain	F: ACR_tran_6th_1	ECOD (1.6)
I [auth C]	OEP	e6iolC1	A: a+b duplicates or obligate multimers	X: Outer membrane efflux proteins (OEP) (From Topology)	H: Outer membrane efflux proteins (OEP) (From Topology)	T: Outer membrane efflux proteins (OEP)	F: OEP	ECOD (1.6)
H [auth B]	OEP	e6iolB1	A: a+b duplicates or obligate multimers	X: Outer membrane efflux proteins (OEP) (From Topology)	H: Outer membrane efflux proteins (OEP) (From Topology)	T: Outer membrane efflux proteins (OEP)	F: OEP	ECOD (1.6)
G [auth A]	OEP	e6iolA1	A: a+b duplicates or obligate multimers	X: Outer membrane efflux proteins (OEP) (From Topology)	H: Outer membrane efflux proteins (OEP) (From Topology)	T: Outer membrane efflux proteins (OEP)	F: OEP	ECOD (1.6)
F [auth N]	PRK15030_2nd	e6iolN1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PRK15030_2nd	ECOD (1.6)
F [auth N]	HlyD_D23_C_1	e6iolN2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: HlyD_D23_C_1	ECOD (1.6)
F [auth N]	PRK15030_1st	e6iolN3	A: alpha bundles	X: helical hairpin of HlyD-like secretion proteins (From Topology)	H: helical hairpin of HlyD-like secretion proteins (From Topology)	T: helical hairpin of HlyD-like secretion proteins	F: PRK15030_1st	ECOD (1.6)
F [auth N]	HlyD_1st	e6iolN4	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Single hybrid motif	F: HlyD_1st	ECOD (1.6)
E [auth M]	PRK15030_2nd	e6iolM2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PRK15030_2nd	ECOD (1.6)
E [auth M]	HlyD_D23_C_1	e6iolM4	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: HlyD_D23_C_1	ECOD (1.6)
E [auth M]	PRK15030_1st	e6iolM3	A: alpha bundles	X: helical hairpin of HlyD-like secretion proteins (From Topology)	H: helical hairpin of HlyD-like secretion proteins (From Topology)	T: helical hairpin of HlyD-like secretion proteins	F: PRK15030_1st	ECOD (1.6)
E [auth M]	HlyD_1st	e6iolM1	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Single hybrid motif	F: HlyD_1st	ECOD (1.6)
D [auth L]	PRK15030_2nd	e6iolL2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PRK15030_2nd	ECOD (1.6)
D [auth L]	HlyD_D23_C_1	e6iolL3	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: HlyD_D23_C_1	ECOD (1.6)
D [auth L]	PRK15030_1st	e6iolL1	A: alpha bundles	X: helical hairpin of HlyD-like secretion proteins (From Topology)	H: helical hairpin of HlyD-like secretion proteins (From Topology)	T: helical hairpin of HlyD-like secretion proteins	F: PRK15030_1st	ECOD (1.6)
D [auth L]	HlyD_1st	e6iolL4	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Single hybrid motif	F: HlyD_1st	ECOD (1.6)
C [auth K]	PRK15030_2nd	e6iolK3	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PRK15030_2nd	ECOD (1.6)
C [auth K]	HlyD_D23_C_1	e6iolK4	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: HlyD_D23_C_1	ECOD (1.6)
C [auth K]	PRK15030_1st	e6iolK1	A: alpha bundles	X: helical hairpin of HlyD-like secretion proteins (From Topology)	H: helical hairpin of HlyD-like secretion proteins (From Topology)	T: helical hairpin of HlyD-like secretion proteins	F: PRK15030_1st	ECOD (1.6)
C [auth K]	HlyD_1st	e6iolK2	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Single hybrid motif	F: HlyD_1st	ECOD (1.6)
B [auth J]	PRK15030_2nd	e6iolJ3	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PRK15030_2nd	ECOD (1.6)
B [auth J]	HlyD_D23_C_1	e6iolJ4	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: HlyD_D23_C_1	ECOD (1.6)
B [auth J]	PRK15030_1st	e6iolJ1	A: alpha bundles	X: helical hairpin of HlyD-like secretion proteins (From Topology)	H: helical hairpin of HlyD-like secretion proteins (From Topology)	T: helical hairpin of HlyD-like secretion proteins	F: PRK15030_1st	ECOD (1.6)
B [auth J]	HlyD_1st	e6iolJ2	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Single hybrid motif	F: HlyD_1st	ECOD (1.6)
A [auth I]	PRK15030_2nd	e6iolI2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PRK15030_2nd	ECOD (1.6)
A [auth I]	HlyD_D23_C_1	e6iolI1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: HlyD_D23_C_1	ECOD (1.6)
A [auth I]	PRK15030_1st	e6iolI4	A: alpha bundles	X: helical hairpin of HlyD-like secretion proteins (From Topology)	H: helical hairpin of HlyD-like secretion proteins (From Topology)	T: helical hairpin of HlyD-like secretion proteins	F: PRK15030_1st	ECOD (1.6)
A [auth I]	HlyD_1st	e6iolI3	A: a+b complex topology	X: alpha/beta-Hammerhead/Barrel-sandwich hybrid	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Single hybrid motif	F: HlyD_1st	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
J [auth F]	3.30.2090.10	Alpha Beta	2-Layer Sandwich	Multidrug efflux transporter AcrB TolC docking domain	DN and DC subdomains	CATH (utative)
K [auth G]	3.30.2090.10	Alpha Beta	2-Layer Sandwich	Multidrug efflux transporter AcrB TolC docking domain	DN and DC subdomains	CATH (utative)
L [auth E]	3.30.2090.10	Alpha Beta	2-Layer Sandwich	Multidrug efflux transporter AcrB TolC docking domain	DN and DC subdomains	CATH (utative)
I [auth C]	1.20.1600.10	Mainly Alpha	Up-down Bundle	Outer membrane efflux proteins (OEP)	Outer membrane efflux proteins (OEP)	CATH (utative)
I [auth C]	2.20.200.10	Mainly Beta	Single Sheet	Outer membrane efflux proteins (OEP)	Outer membrane efflux proteins (OEP)	CATH (utative)
H [auth B]	1.20.1600.10	Mainly Alpha	Up-down Bundle	Outer membrane efflux proteins (OEP)	Outer membrane efflux proteins (OEP)	CATH (utative)
H [auth B]	2.20.200.10	Mainly Beta	Single Sheet	Outer membrane efflux proteins (OEP)	Outer membrane efflux proteins (OEP)	CATH (utative)
G [auth A]	1.20.1600.10	Mainly Alpha	Up-down Bundle	Outer membrane efflux proteins (OEP)	Outer membrane efflux proteins (OEP)	CATH (utative)
G [auth A]	2.20.200.10	Mainly Beta	Single Sheet	Outer membrane efflux proteins (OEP)	Outer membrane efflux proteins (OEP)	CATH (utative)
E [auth M]	1.10.287.470	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Helix hairpin bin	CATH (utative)
C [auth K]	1.10.287.470	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Helix hairpin bin	CATH (utative)
B [auth J]	1.10.287.470	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Helix hairpin bin	CATH (utative)

AMR Gene: CARD Annotation CARD Database Homepage

Chains	Accession	Short Name	Description	Provenance Source (Version)
G [auth A], H [auth B], I [auth C]	ARO:3000379	OprM	OprM is an outer membrane factor protein found in Pseudomonas aeruginosa and Burkholderia vietnamiensis. It is part of the MexAB-OprM, MexVW-OprM, MexXY-OprM and the AmrAB-OprM complex.	CARD (4.0.1)

AMR Gene Family: CARD Annotation CARD Database Homepage

Chains	Accession	Gene Family	Drug Class	Resistance Machanism	Provenance Source (Version)
G [auth A], H [auth B], I [auth C]	ARO:0010004	resistance-nodulation-cell division (RND) antibiotic efflux pump	macrolide antibiotic, fluoroquinolone antibiotic, aminoglycoside antibiotic, carbapenem, cephalosporin, penicillin beta-lactam, tetracycline antibiotic, phenicol antibiotic, disinfecting agents and antiseptics	antibiotic efflux	CARD (4.0.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
J [auth F], K [auth G], L [auth E]	PF00873	AcrB/AcrD/AcrF family (ACR_tran)	AcrB/AcrD/AcrF family	-	Family
G [auth A], H [auth B], I [auth C]	PF02321	Outer membrane efflux protein (OEP)	Outer membrane efflux protein	-	Family
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	PF25876	RND MFP, alpha-helical hairpin domain (HH_MFP_RND)	RND MFP, alpha-helical hairpin domain	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the ...	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the outer membrane factor TolC and the resistance- nodulation-division-type efflux transporter AcrB, which is a major multidrug efflux pump in Escherichia coli [1]. The alpha -helical hairpin domain of AcrA shows conformational flexibility, which has potential mechanistic significance in coupling between AcrA conformations and TolC channel opening [1].	Domain
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	PF25917	RND MFP, barrel-sandwich hybrid domain (BSH_RND)	RND MFP, barrel-sandwich hybrid domain	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the ...	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the outer membrane factor TolC and the resistance-nodulation-division-type efflux transporter AcrB, which is a major multidrug efflux pump in Escherichia coli [1]. The barrel-sandwich hybrid domain is an important structural feature found in membrane fusion proteins. This domain plays a crucial role in the assembly and function of tripartite drug efflux systems [2]. It is involved in interactions with the other components of the RND pumps.	Domain
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	PF25967	RND MFPs, C-terminal permuted SH3 domain (RND-MFP_C)	RND MFPs, C-terminal permuted SH3 domain	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the ...	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the outer membrane factor TolC and the resistance- nodulation-division-type efflux transporter AcrB, which is a major multidrug efflux pump in Escherichia coli [1]. Another member MexA, a Pseudomonas aeruginosa homolog of AcrA, is a component of the tripartite multidrug efflux system MexAB-OprM which is a major factor for antibiotic resistance by exporting a large variety of antimicrobial compounds [2]. The domain represented by this entry folds into an open barrel with a circularly permuted topology of SH3-like barrels. This domain is involved in interactions with efflux pump membrane transporter.	Domain
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	PF25944	RND MFPs, beta-barrel domain (Beta-barrel_RND)	RND MFPs, beta-barrel domain	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the ...	This domain is found in the periplasmic membrane fusion proteins (MFPs) that are components of the RND tripartite drug efflux pumps. MFPs bridge the outer membrane factor and an inner membrane transporter. The most characterized MFP AcrA connects the outer membrane factor TolC and the resistance- nodulation-division-type efflux transporter AcrB, which is a major multidrug efflux pump in Escherichia coli [1,2]. The domain represented in this entry folds into a six-stranded closed beta-barrel with a greek-key topology which has a structural similarity to the C-terminal domain of alanine racemase. This domain is interrupted by the barrel-sandwich hybrid domain which is inserted after the first beta-strand of the barrel. This model does not include the N-terminal strand.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
J [auth F], K [auth G], L [auth E]	Multidrug resistance protein MexB	efflux transmembrane transporter activity transporter activity transmembrane transporter activity xenobiotic transmembrane transporter activity	xenobiotic transport response to stimulus transport detoxification export across cell outer membrane xenobiotic detoxification by transmembrane export across the cell outer membrane establishment of localization response to toxic substance transmembrane transport localization response to chemical cellular process response to antibiotic	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex efflux pump complex transmembrane transporter complex membrane protein complex transporter complex
G [auth A], H [auth B], I [auth C]	Outer membrane protein OprM	efflux transmembrane transporter activity transporter activity transmembrane transporter activity	xenobiotic transport response to stimulus transport detoxification export across cell outer membrane xenobiotic detoxification by transmembrane export across the cell outer membrane establishment of localization response to toxic substance transmembrane transport localization response to chemical cellular process response to antibiotic	cellular anatomical structure membrane protein-containing complex efflux pump complex transmembrane transporter complex membrane protein complex transporter complex cell periphery cell outer membrane external encapsulating structure cell envelope outer membrane
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	Multidrug resistance protein MexA	efflux transmembrane transporter activity transporter activity transmembrane transporter activity identical protein binding protein binding binding	response to stimulus response to chemical response to antibiotic localization xenobiotic transport transport establishment of localization cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization response to stimulus response to chemical response to antibiotic localization xenobiotic transport transport establishment of localization cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization cellular process cellular component organization or biogenesis response to toxic substance	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
J [auth F], K [auth G], L [auth E]	IPR001036	Acriflavin resistance protein	Family
J [auth F], K [auth G], L [auth E]	IPR004764	Multidrug resistance protein MdtF-like	Family
J [auth F], K [auth G], L [auth E]	IPR027463	Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains	Homologous Superfamily
G [auth A], H [auth B], I [auth C]	IPR003423	Outer membrane efflux protein	Family
G [auth A], H [auth B], I [auth C]	IPR010131	Multidrug resistance outer membrane protein MdtP/Nodulation protein T-like	Family
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	IPR058194	Multidrug resistance protein MexA	Family
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	IPR058627	Multidrug resistance protein MdtA-like, C-terminal permuted SH3 domain	Domain
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	IPR006143	RND efflux pump, membrane fusion protein	Family
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	IPR058625	Multidrug resistance protein MdtA-like, barrel-sandwich hybrid domain	Domain
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	IPR058626	Multidrug resistance protein MdtA-like, beta-barrel domain	Domain
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N]	IPR058624	Multidrug resistance protein MdtA-like, alpha-helical hairpin domain	Domain

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M] A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N], G [auth A], H [auth B], I [auth C], J [auth F], K [auth G], L [auth E]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth I], B [auth J], C [auth K], D [auth L], E [auth M] A [auth I], B [auth J], C [auth K], D [auth L], E [auth M], F [auth N], G [auth A], H [auth B], I [auth C], J [auth F], K [auth G], L [auth E]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Multi-Drug Efflux Transporters	MexAB-OprM tripartite efflux pump, 0 degree state