6YSF,6YKM


Conserved Protein Domain Family
MotB_plug
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pfam13677: MotB_plug (This model is not part of the current CDD release)
Membrane MotB of proton-channel complex MotA/MotB
This is the MotB member of the E.coli MotA/MotB proton-channel complex that forms the stator of the bacterial membrane flagellar motor. Key residues act as a plug to prevent premature proton flow. The plug is in the periplasm just C-terminal to the MotB TM, consisting of an amphipathic alpha helix flanked by Pro-52 and Pro-65. In addition to the Pro residues, Ile-58, Tyr-61, and Phe 62 are also essential for plug function.
Links
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Statistics
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PSSM-Id: 520855
Aligned: 248 rows
Threshold Bit Score: 28.266
Created: 16-Feb-2025
Updated: 28-Apr-2025
Structure
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Program:
Drawing:
Aligned Rows:
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PubMed ReferencesClick to see Conserved Features Help
Sequence Alignment
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Format: Row Display: Color Bits: Type Selection: 
6YSF_A         3 RRNKKggGGDEIRGDEWLATFSDTITLLLTFFILLYSFSSVDAQKFQQVASAMQVAM 59  Clostridium sporogenes
WP_012589090  13 KRYSR--DDEARHGGAWKIAFADFMTAMMALFLVLWLISSTSDKTKHSVAQYFNPvk 67  Methylocella silvestris
Q89F39        13 RRSAF--AEEAHHGGVWKIAYADFMTAMMAFFLVMWLLNALNQDQKQVVASYFNPik 67  Bradyrhizobium japonicum
WP_023786233  15 RRGGD--GDEGHHGGAWKIAFADLMTAMMAFFLVMWLLNVSDKEKIQQIATYFNPmk 69  Hyphomicrobium nitrativorans
WP_013420162  18 KKLYR--SDGDNHGGVWKIAYADFMTAMMTFFLVMWLVNSSSKERLSQIANYFNPvk 72  Rhodomicrobium vannielii
WP_012373228   4 KK------AAAGHGGAWKVAYADFVTAMMALFMVLW-ISAQDQKILIATSQYFQNPF 53  Opitutus terrae
WP_013792117  16 RRSRK--GHEEGHGGAWKVAFADFTMAMMALFMVLWIVNPRNEMTSPSQGDMLTNPl 70  Pseudomonas
WP_014293246  11 RKSRH--KGEGSHGGAWKVAFADFALAMMALFMVLWILAVSSEQERETVSSQLRDys 65  Oceanimonas sp. GK1
Q6LW21        12 KRARR--HHDEHHGGAWKVAFADFAIAMMAFFMVLWLMGITTQEERIEIEQRLQTAs 66  Photobacterium profundum
WP_013681587  15 KKCK----CEEGGGSAWEVAYGDFMTSMMAFFLVMWLIAATNVKQRKVLSTYFTQPg 67  Hippea maritima
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