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Protein

Large-conductance mechanosensitive channel

Gene

mscL

Organism
Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Channel that opens in response to stretch forces in the membrane lipid bilayer. The force required to trigger channel opening depends on the nature of the membrane lipids; the presence of phosphatidylinositol enhances mechanosensitivity of the channel. May participate in the regulation of osmotic pressure changes within the cell.1 Publication

Miscellaneous

E.coli inner membranes are often used to measure the activity of heterologously expressed channels, but the lipid composition of E.coli membranes differs considerably from that of M.tuberculosis. Phosphatidylinositol is one of the major constituents of M.tuberculosis membranes, but not of E.coli membranes, and this affects channel activity.1 Publication

GO - Molecular functioni

  • gated channel activity Source: MTBBASE
  • identical protein binding Source: IntAct
  • mechanosensitive ion channel activity Source: MTBBASE

GO - Biological processi

Keywordsi

Molecular functionIon channel
Biological processIon transport, Transport

Names & Taxonomyi

Protein namesi
Recommended name:
Large-conductance mechanosensitive channelUniRule annotation
Gene namesi
Name:mscLUniRule annotation
Ordered Locus Names:Rv0985c
ORF Names:MTV044.13c
OrganismiMycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Taxonomic identifieri83332 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycobacteriumMycobacterium tuberculosis complex
Proteomesi
  • UP000001584 Componenti: Chromosome

Organism-specific databases

TubercuListiRv0985c

Subcellular locationi

  • Cell membrane UniRule annotation1 Publication1 Publication; Multi-pass membrane protein UniRule annotation1 Publication

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 14Cytoplasmic1 PublicationAdd BLAST14
Transmembranei15 – 43Helical1 PublicationAdd BLAST29
Topological domaini44 – 68Extracellular1 PublicationAdd BLAST25
Transmembranei69 – 89Helical1 PublicationAdd BLAST21
Topological domaini90 – 151Cytoplasmic1 PublicationAdd BLAST62

GO - Cellular componenti

  • integral component of plasma membrane Source: MTBBASE
  • plasma membrane Source: MTBBASE

Keywords - Cellular componenti

Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001924521 – 151Large-conductance mechanosensitive channelAdd BLAST151

Proteomic databases

PaxDbiP9WJN5

Interactioni

Subunit structurei

Homopentamer.UniRule annotation1 Publication

Binary interactionsi

WithEntry#Exp.IntActNotes
itself2EBI-15799854,EBI-15799854

GO - Molecular functioni

  • identical protein binding Source: IntAct

Structurei

Secondary structure

1151
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi2 – 10Combined sources9
Helixi13 – 46Combined sources34
Beta strandi51 – 53Combined sources3
Beta strandi65 – 67Combined sources3
Helixi69 – 89Combined sources21
Helixi91 – 99Combined sources9
Helixi106 – 123Combined sources18

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
2OARX-ray3.50A/B/C/D/E1-151[»]
ProteinModelPortaliP9WJN5
SMRiP9WJN5
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the MscL family.UniRule annotationCurated

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG41080FJ Bacteria
COG1970 LUCA
KOiK03282
OMAiYGSFIQT
PhylomeDBiP9WJN5

Family and domain databases

Gene3Di1.10.1200.120, 1 hit
HAMAPiMF_00115 MscL, 1 hit
InterProiView protein in InterPro
IPR036019 Gated_MS_channel
IPR019823 Mechanosensitive_channel_CS
IPR001185 MS_channel
IPR037673 MSC/AndL
PANTHERiPTHR30266 PTHR30266, 1 hit
PfamiView protein in Pfam
PF01741 MscL, 1 hit
PRINTSiPR01264 MECHCHANNEL
SUPFAMiSSF81330 SSF81330, 1 hit
TIGRFAMsiTIGR00220 mscL, 1 hit
PROSITEiView protein in PROSITE
PS01327 MSCL, 1 hit

Sequencei

Sequence statusi: Complete.

P9WJN5-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MLKGFKEFLA RGNIVDLAVA VVIGTAFTAL VTKFTDSIIT PLINRIGVNA
60 70 80 90 100
QSDVGILRIG IGGGQTIDLN VLLSAAINFF LIAFAVYFLV VLPYNTLRKK
110 120 130 140 150
GEVEQPGDTQ VVLLTEIRDL LAQTNGDSPG RHGGRGTPSP TDGPRASTES

Q
Length:151
Mass (Da):16,023
Last modified:April 16, 2014 - v1
Checksum:iD682D3F2C1651E9C
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AL123456 Genomic DNA Translation: CCP43735.1
PIRiE70821
RefSeqiNP_215500.1, NC_000962.3
WP_003405128.1, NZ_KK339370.1

Genome annotation databases

EnsemblBacteriaiCCP43735; CCP43735; Rv0985c
GeneIDi885368
KEGGimtu:Rv0985c

Similar proteinsi

Entry informationi

Entry nameiMSCL_MYCTU
AccessioniPrimary (citable) accession number: P9WJN5
Secondary accession number(s): L0T5D5, O53898, P0A5K8
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 16, 2014
Last sequence update: April 16, 2014
Last modified: April 25, 2018
This is version 30 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

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