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4QKC

Influenza A M2 wild type TM domain at low pH in the lipidic cubic phase under cryo diffraction conditions

Functional Information from GO Data
ChainGOidnamespacecontents
A0015078molecular_functionproton transmembrane transporter activity
A0033644cellular_componenthost cell membrane
A0055036cellular_componentvirion membrane
A1902600biological_processproton transmembrane transport
Functional Information from PDB Data
site_idAC1
Number of Residues12
DetailsBINDING SITE FOR RESIDUE CA A 101
ChainResidue
ASER22
AHOH242
AHOH242
AHOH242
ASER22
ASER22
ASER22
AHOH201
AHOH201
AHOH201
AHOH201
AHOH242

site_idAC2
Number of Residues4
DetailsBINDING SITE FOR RESIDUE CL A 102
ChainResidue
ASER23
ASER23
ASER23
ASER23

site_idAC3
Number of Residues6
DetailsBINDING SITE FOR RESIDUE CA A 103
ChainResidue
AASP24
AOLB105
AHOH207
AHOH211
AHOH212
AHOH220

site_idAC4
Number of Residues6
DetailsBINDING SITE FOR RESIDUE EDO A 104
ChainResidue
AHIS37
AHIS37
ATRP41
AHOH223
AHOH224
AHOH227

site_idAC5
Number of Residues15
DetailsBINDING SITE FOR RESIDUE OLB A 105
ChainResidue
AASP24
APRO25
ALEU26
AILE35
ALEU38
AILE39
AILE42
ALEU43
AARG45
ANH247
ACA103
AOLB106
AHOH207
AHOH211
AHOH220

site_idAC6
Number of Residues11
DetailsBINDING SITE FOR RESIDUE OLB A 106
ChainResidue
APRO25
AVAL28
AALA29
AILE33
AHIS37
AILE39
ALEU40
AARG45
AOLB105
AHOH206
AHOH240

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues20
DetailsTRANSMEM: Helical; Signal-anchor for type III membrane protein => ECO:0000255|HAMAP-Rule:MF_04069
ChainResidueDetails
ASER23-LEU43

site_idSWS_FT_FI2
Number of Residues1
DetailsSITE: Essential for channel activity, possibly by being protonated during channel activation, and by forming the channel gate and the selective filter => ECO:0000255|HAMAP-Rule:MF_04069
ChainResidueDetails
AHIS37

site_idSWS_FT_FI3
Number of Residues1
DetailsSITE: Seems to be involved in pH gating => ECO:0000255|HAMAP-Rule:MF_04069
ChainResidueDetails
ATRP41

237423

PDB entries from 2025-06-11

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