ID   CORA_CAMJR              Reviewed;         327 AA.
AC   Q5HV55;
DT   30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT   15-FEB-2005, sequence version 1.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=Magnesium transport protein CorA;
GN   Name=corA; OrderedLocusNames=CJE0826;
OS   Campylobacter jejuni (strain RM1221).
OC   Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC   Campylobacteraceae; Campylobacter.
OX   NCBI_TaxID=195099;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RM1221;
RX   PubMed=15660156; DOI=10.1371/journal.pbio.0030015;
RA   Fouts D.E., Mongodin E.F., Mandrell R.E., Miller W.G., Rasko D.A.,
RA   Ravel J., Brinkac L.M., DeBoy R.T., Parker C.T., Daugherty S.C.,
RA   Dodson R.J., Durkin A.S., Madupu R., Sullivan S.A., Shetty J.U.,
RA   Ayodeji M.A., Shvartsbeyn A., Schatz M.C., Badger J.H., Fraser C.M.,
RA   Nelson K.E.;
RT   "Major structural differences and novel potential virulence mechanisms from
RT   the genomes of multiple Campylobacter species.";
RL   PLoS Biol. 3:72-85(2005).
CC   -!- FUNCTION: Mediates influx of magnesium ions. Can also mediate cobalt
CC       and manganese uptake (By similarity). Alternates between open and
CC       closed states. Activated by low cytoplasmic Mg(2+) levels. Inactive
CC       when cytoplasmic Mg(2+) levels are high (By similarity).
CC       {ECO:0000250|UniProtKB:P0ABI4, ECO:0000250|UniProtKB:Q9WZ31}.
CC   -!- SUBUNIT: Homopentamer. In the absence of Mg(2+), interactions between
CC       subunits are weakened, and dimers, trimers and tetramers can be
CC       observed in vitro (By similarity). {ECO:0000250|UniProtKB:Q9WZ31}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane
CC       {ECO:0000250|UniProtKB:Q7VRM7}; Multi-pass membrane protein
CC       {ECO:0000250|UniProtKB:Q9WZ31}.
CC   -!- DOMAIN: The central ion permeation pathway is formed by the first
CC       transmembrane domain from each of the five subunits. Mg(2+) binding
CC       strengthens interactions between subunits and leads to the formation of
CC       a symmetrical homopentamer surrounding a closed ion permeation pathway.
CC       Co(2+) binding also induces a conformation change. Low Mg(2+)
CC       concentrations trigger both a conformation change within each subunit
CC       and a loosening of the interactions between subunits. This results in
CC       an open ion conduction pathway. In addition, this results in a less
CC       symmetrical shape of the whole complex. {ECO:0000250|UniProtKB:Q9WZ31}.
CC   -!- SIMILARITY: Belongs to the CorA metal ion transporter (MIT) (TC 1.A.35)
CC       family. {ECO:0000305}.
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DR   EMBL; CP000025; AAW34611.1; -; Genomic_DNA.
DR   RefSeq; WP_002873011.1; NC_003912.7.
DR   AlphaFoldDB; Q5HV55; -.
DR   SMR; Q5HV55; -.
DR   KEGG; cjr:CJE0826; -.
DR   HOGENOM; CLU_007127_5_0_7; -.
DR   OMA; RQNDDMR; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015087; F:cobalt ion transmembrane transporter activity; IEA:InterPro.
DR   GO; GO:0015095; F:magnesium ion transmembrane transporter activity; IEA:InterPro.
DR   InterPro; IPR045861; CorA_cytoplasmic_dom.
DR   InterPro; IPR045863; CorA_TM1_TM2.
DR   InterPro; IPR004488; Mg/Co-transport_prot_CorA.
DR   InterPro; IPR002523; MgTranspt_CorA/ZnTranspt_ZntB.
DR   Pfam; PF01544; CorA; 1.
DR   SUPFAM; SSF143865; SSF143865; 1.
DR   SUPFAM; SSF144083; SSF144083; 1.
DR   TIGRFAMs; TIGR00383; corA; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Ion transport; Magnesium; Membrane;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..327
FT                   /note="Magnesium transport protein CorA"
FT                   /id="PRO_0000239092"
FT   TRANSMEM        269..289
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        301..321
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   MOTIF           288..290
FT                   /note="Probable selectivity filter"
FT                   /evidence="ECO:0000250|UniProtKB:Q9WZ31"
FT   SITE            264
FT                   /note="Essential for ion permeation"
FT                   /evidence="ECO:0000250|UniProtKB:Q9WZ31"
SQ   SEQUENCE   327 AA;  38202 MW;  0CA345DBB93EC12C CRC64;
     MLYIYIKTQN ALVQRINFNL DSQELPQNIL WIDLLHPSAA EIAFISSEFN LEFPTKEERE
     EIELSAKYWE DNATITINAH FLVRDLKNDE EDRNLIKLRT EIVTFATAKN ILFTIRYNEF
     STFEEIQARI LASPKNFEDG FDIIDKMFEV RVEKDADLLE WIDKEARRLR TSVLEKKDEY
     SYDEMLKDIS SLQELNMRVR DSLFDKRRAM TSLLKSDKID KDIKQNLTIV LKDLNSLVEF
     SVSQLNILDN IQTILASQIN IEQNKIIKIF TVATVAMMPP TLIGTVYGMN FKFMPELELH
     YAYPIVLGVM VISIILPLVV FKKKGWL