位置:首页 > 蛋白库 > MELB_ECOLI
MELB_ECOLI
ID   MELB_ECOLI              Reviewed;         473 AA.
AC   P02921; Q2M6I4;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   19-OCT-2011, sequence version 2.
DT   03-AUG-2022, entry version 168.
DE   RecName: Full=Melibiose permease {ECO:0000303|PubMed:3316227};
DE   AltName: Full=Melibiose carrier {ECO:0000303|PubMed:6323466};
DE   AltName: Full=Melibiose transporter;
DE   AltName: Full=Melibiose/cation symporter {ECO:0000305};
DE   AltName: Full=Na+ (Li+)/melibiose symporter;
DE   AltName: Full=Thiomethylgalactoside permease II;
GN   Name=melB {ECO:0000303|PubMed:6323466}; Synonyms=mel-4;
GN   OrderedLocusNames=b4120, JW4081;
OS   Escherichia coli (strain K12).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=83333;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=6323466; DOI=10.1016/s0021-9258(17)43048-1;
RA   Yazyu H., Shiota-Niiya S., Shimamoto T., Kanazawa H., Futai M.,
RA   Tsuchiya T.;
RT   "Nucleotide sequence of the melB gene and characteristics of deduced amino
RT   acid sequence of the melibiose carrier in Escherichia coli.";
RL   J. Biol. Chem. 259:4320-4326(1984).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=K12 / MG1655 / ATCC 47076;
RX   PubMed=7610040; DOI=10.1093/nar/23.12.2105;
RA   Burland V.D., Plunkett G. III, Sofia H.J., Daniels D.L., Blattner F.R.;
RT   "Analysis of the Escherichia coli genome VI: DNA sequence of the region
RT   from 92.8 through 100 minutes.";
RL   Nucleic Acids Res. 23:2105-2119(1995).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=K12 / MG1655 / ATCC 47076;
RX   PubMed=9278503; DOI=10.1126/science.277.5331.1453;
RA   Blattner F.R., Plunkett G. III, Bloch C.A., Perna N.T., Burland V.,
RA   Riley M., Collado-Vides J., Glasner J.D., Rode C.K., Mayhew G.F.,
RA   Gregor J., Davis N.W., Kirkpatrick H.A., Goeden M.A., Rose D.J., Mau B.,
RA   Shao Y.;
RT   "The complete genome sequence of Escherichia coli K-12.";
RL   Science 277:1453-1462(1997).
RN   [4]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=K12 / W3110 / ATCC 27325 / DSM 5911;
RX   PubMed=16738553; DOI=10.1038/msb4100049;
RA   Hayashi K., Morooka N., Yamamoto Y., Fujita K., Isono K., Choi S.,
RA   Ohtsubo E., Baba T., Wanner B.L., Mori H., Horiuchi T.;
RT   "Highly accurate genome sequences of Escherichia coli K-12 strains MG1655
RT   and W3110.";
RL   Mol. Syst. Biol. 2:E1-E5(2006).
RN   [5]
RP   PROTEIN SEQUENCE OF 2-8, FUNCTION, CATALYTIC ACTIVITY, SUBCELLULAR
RP   LOCATION, AND SUBUNIT.
RX   PubMed=7703254; DOI=10.1021/bi00013a033;
RA   Pourcher T., Leclercq S., Brandolin G., Leblanc G.;
RT   "Melibiose permease of Escherichia coli: large scale purification and
RT   evidence that H+, Na+, and Li+ sugar symport is catalyzed by a single
RT   polypeptide.";
RL   Biochemistry 34:4412-4420(1995).
RN   [6]
RP   FUNCTION, AND CATALYTIC ACTIVITY.
RC   STRAIN=K12 / W3133;
RX   PubMed=45782; DOI=10.3109/09687687809063858;
RA   Tsuchiya T., Wilson T.H.;
RT   "Cation-sugar cotransport in the melibiose transport system of Escherichia
RT   coli.";
RL   Membr. Biochem. 2:63-79(1978).
RN   [7]
RP   FUNCTION, AND CATALYTIC ACTIVITY.
RX   PubMed=3311166; DOI=10.1016/0005-2736(87)90368-3;
RA   Wilson D.M., Wilson T.H.;
RT   "Cation specificity for sugar substrates of the melibiose carrier in
RT   Escherichia coli.";
RL   Biochim. Biophys. Acta 904:191-200(1987).
RN   [8]
RP   FUNCTION, AND CATALYTIC ACTIVITY.
RX   PubMed=3316227; DOI=10.1016/s0021-9258(18)45463-4;
RA   Bassilana M., Pourcher T., Leblanc G.;
RT   "Facilitated diffusion properties of melibiose permease in Escherichia coli
RT   membrane vesicles. Release of co-substrates is rate limiting for permease
RT   cycling.";
RL   J. Biol. Chem. 262:16865-16870(1987).
RN   [9]
RP   FUNCTION, CATALYTIC ACTIVITY, AND SUBUNIT.
RX   PubMed=2185831; DOI=10.1021/bi00462a020;
RA   Roepe P.D., Kaback H.R.;
RT   "Isolation and functional reconstitution of soluble melibiose permease from
RT   Escherichia coli.";
RL   Biochemistry 29:2572-2577(1990).
RN   [10]
RP   MUTAGENESIS OF ASP-59.
RX   PubMed=1872836; DOI=10.1016/0006-291x(91)91016-6;
RA   Pourcher T., Deckert M., Bassilana M., Leblanc G.;
RT   "Melibiose permease of Escherichia coli: mutation of aspartic acid 55 in
RT   putative helix II abolishes activation of sugar binding by Na+ ions.";
RL   Biochem. Biophys. Res. Commun. 178:1176-1181(1991).
RN   [11]
RP   SUBCELLULAR LOCATION, AND TOPOLOGY.
RX   PubMed=1730719; DOI=10.1016/s0021-9258(18)46019-x;
RA   Botfield M.C., Noguchi K., Tsuchiya T., Wilson T.H.;
RT   "Membrane topology of the melibiose carrier of Escherichia coli.";
RL   J. Biol. Chem. 267:1818-1822(1992).
RN   [12]
RP   SUBCELLULAR LOCATION, AND TOPOLOGY.
RX   PubMed=8672452; DOI=10.1021/bi9527496;
RA   Pourcher T., Bibi E., Kaback H.R., Leblanc G.;
RT   "Membrane topology of the melibiose permease of Escherichia coli studied by
RT   melB-phoA fusion analysis.";
RL   Biochemistry 35:4161-4168(1996).
RN   [13]
RP   MUTAGENESIS OF LYS-18; ASP-19; ASP-35; ARG-52; ASP-55; ASP-59; ASP-124;
RP   ARG-199 AND GLU-203.
RX   PubMed=11444849; DOI=10.1006/bbrc.2001.5200;
RA   Ding P.Z., Wilson T.H.;
RT   "The effect of modifications of the charged residues in the transmembrane
RT   helices on the transport activity of the melibiose carrier of Escherichia
RT   coli.";
RL   Biochem. Biophys. Res. Commun. 285:348-354(2001).
RN   [14]
RP   DOMAIN, AND CRYSTALLIZATION.
RX   PubMed=12110569; DOI=10.1093/emboj/cdf378;
RA   Hacksell I., Rigaud J.L., Purhonen P., Pourcher T., Hebert H., Leblanc G.;
RT   "Projection structure at 8 A resolution of the melibiose permease, an Na-
RT   sugar co-transporter from Escherichia coli.";
RL   EMBO J. 21:3569-3574(2002).
RN   [15]
RP   DOMAIN, AND MUTAGENESIS OF LYS-138; ARG-139; ARG-141 AND ARG-149.
RX   PubMed=12421811; DOI=10.1074/jbc.m210053200;
RA   Abdel-Dayem M., Basquin C., Pourcher T., Cordat E., Leblanc G.;
RT   "Cytoplasmic loop connecting helices IV and V of the melibiose permease
RT   from Escherichia coli is involved in the process of Na+-coupled sugar
RT   translocation.";
RL   J. Biol. Chem. 278:1518-1524(2003).
RN   [16]
RP   TOPOLOGY [LARGE SCALE ANALYSIS].
RC   STRAIN=K12 / MG1655 / ATCC 47076;
RX   PubMed=15919996; DOI=10.1126/science.1109730;
RA   Daley D.O., Rapp M., Granseth E., Melen K., Drew D., von Heijne G.;
RT   "Global topology analysis of the Escherichia coli inner membrane
RT   proteome.";
RL   Science 308:1321-1323(2005).
RN   [17]
RP   DOMAIN, AND PROTEIN MODEL.
RX   PubMed=19706416; DOI=10.1073/pnas.0905516106;
RA   Yousef M.S., Guan L.;
RT   "A 3D structure model of the melibiose permease of Escherichia coli
RT   represents a distinctive fold for Na+ symporters.";
RL   Proc. Natl. Acad. Sci. U.S.A. 106:15291-15296(2009).
RN   [18]
RP   MUTAGENESIS OF ASP-19; ASP-55; ASP-59 AND ASP-124, AND PROTEIN MODEL.
RX   PubMed=21135207; DOI=10.1073/pnas.1008649107;
RA   Granell M., Leon X., Leblanc G., Padros E., Lorenz-Fonfria V.A.;
RT   "Structural insights into the activation mechanism of melibiose permease by
RT   sodium binding.";
RL   Proc. Natl. Acad. Sci. U.S.A. 107:22078-22083(2010).
CC   -!- FUNCTION: Mediates the transport of melibiose and other galactosides by
CC       a symport mechanism (PubMed:45782, PubMed:3311166, PubMed:3316227,
CC       PubMed:2185831, PubMed:7703254). Can use sodium, lithium and protons as
CC       coupling cations, depending on the sugar substrate and the cationic
CC       environment (PubMed:45782, PubMed:3311166, PubMed:3316227,
CC       PubMed:7703254). Alpha-galactosides (melibiose, raffinose, p-
CC       nitrophenyl-alpha-galactoside or methyl-alpha-galactoside) are
CC       cotransported with either Na(+) or H(+), whereas beta-galactosides
CC       (lactose, L-arabinose-beta-D-galactoside, D-fructose-beta-D-
CC       galactoside, methyl-beta-galactoside or p-nitrophenyl-beta-galactoside)
CC       are cotransported with Na(+) or Li(+) but not H(+) (PubMed:45782,
CC       PubMed:3311166). The monosaccharide D-galactose can use either Na(+) or
CC       H(+) for cotransport whereas D-fucose, L-arabinose and D-galactosamine
CC       can use only Na(+) (PubMed:3311166). {ECO:0000269|PubMed:2185831,
CC       ECO:0000269|PubMed:3311166, ECO:0000269|PubMed:3316227,
CC       ECO:0000269|PubMed:45782, ECO:0000269|PubMed:7703254}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=melibiose(in) + Na(+)(in) = melibiose(out) + Na(+)(out);
CC         Xref=Rhea:RHEA:28851, ChEBI:CHEBI:28053, ChEBI:CHEBI:29101;
CC         Evidence={ECO:0000269|PubMed:3311166, ECO:0000269|PubMed:3316227,
CC         ECO:0000269|PubMed:45782, ECO:0000269|PubMed:7703254};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Li(+)(in) + melibiose(in) = Li(+)(out) + melibiose(out);
CC         Xref=Rhea:RHEA:28847, ChEBI:CHEBI:28053, ChEBI:CHEBI:49713;
CC         Evidence={ECO:0000269|PubMed:3316227, ECO:0000269|PubMed:7703254};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H(+)(in) + melibiose(in) = H(+)(out) + melibiose(out);
CC         Xref=Rhea:RHEA:28855, ChEBI:CHEBI:15378, ChEBI:CHEBI:28053;
CC         Evidence={ECO:0000269|PubMed:2185831, ECO:0000269|PubMed:3311166,
CC         ECO:0000269|PubMed:3316227, ECO:0000269|PubMed:45782,
CC         ECO:0000269|PubMed:7703254};
CC   -!- SUBUNIT: Monomer and homodimer. {ECO:0000269|PubMed:2185831,
CC       ECO:0000269|PubMed:7703254}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000269|PubMed:1730719,
CC       ECO:0000269|PubMed:7703254, ECO:0000269|PubMed:8672452}; Multi-pass
CC       membrane protein {ECO:0000269|PubMed:1730719,
CC       ECO:0000269|PubMed:8672452}.
CC   -!- DOMAIN: Consists of two pseudosymmetrical 6-helix bundles lining an
CC       internal hydrophilic cavity, which faces the cytoplasmic side of the
CC       membrane and probably contains the binding sites for both cosubstrates
CC       (PubMed:12110569, PubMed:19706416). The cytoplasmic loop connecting the
CC       membrane-spanning segments 4 and 5 is close to the sugar binding site
CC       and may participate directly in cosubstrate translocation by MelB
CC       (PubMed:12421811). The charged residue Arg-141 is probably involved in
CC       the reaction of cosubstrate translocation or substrate release in the
CC       inner compartment (PubMed:12421811). {ECO:0000269|PubMed:12110569,
CC       ECO:0000269|PubMed:12421811, ECO:0000269|PubMed:19706416}.
CC   -!- SIMILARITY: Belongs to the sodium:galactoside symporter (TC 2.A.2)
CC       family. {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=AAA24148.1; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305};
CC       Sequence=AAA97020.1; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305};
CC       Sequence=BAE78122.1; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305};
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; K01991; AAA24148.1; ALT_INIT; Genomic_DNA.
DR   EMBL; U14003; AAA97020.1; ALT_INIT; Genomic_DNA.
DR   EMBL; U00096; AAC77081.2; -; Genomic_DNA.
DR   EMBL; AP009048; BAE78122.1; ALT_INIT; Genomic_DNA.
DR   PIR; A03421; BDEC.
DR   RefSeq; NP_418544.2; NC_000913.3.
DR   RefSeq; WP_000028111.1; NZ_SSZK01000018.1.
DR   AlphaFoldDB; P02921; -.
DR   SMR; P02921; -.
DR   BioGRID; 4263176; 14.
DR   DIP; DIP-10180N; -.
DR   IntAct; P02921; 1.
DR   STRING; 511145.b4120; -.
DR   PaxDb; P02921; -.
DR   PRIDE; P02921; -.
DR   EnsemblBacteria; AAC77081; AAC77081; b4120.
DR   EnsemblBacteria; BAE78122; BAE78122; BAE78122.
DR   GeneID; 948635; -.
DR   KEGG; ecj:JW4081; -.
DR   KEGG; eco:b4120; -.
DR   PATRIC; fig|511145.12.peg.4251; -.
DR   EchoBASE; EB0573; -.
DR   eggNOG; COG2211; Bacteria.
DR   HOGENOM; CLU_027408_0_3_6; -.
DR   InParanoid; P02921; -.
DR   PhylomeDB; P02921; -.
DR   BioCyc; EcoCyc:MELB-MON; -.
DR   BioCyc; MetaCyc:MELB-MON; -.
DR   PRO; PR:P02921; -.
DR   Proteomes; UP000000318; Chromosome.
DR   Proteomes; UP000000625; Chromosome.
DR   GO; GO:0005887; C:integral component of plasma membrane; IDA:EcoCyc.
DR   GO; GO:0005886; C:plasma membrane; IDA:EcoCyc.
DR   GO; GO:0015487; F:melibiose:cation symporter activity; IDA:EcoCyc.
DR   GO; GO:0043887; F:melibiose:sodium symporter activity; IDA:EcoCyc.
DR   GO; GO:0015592; F:methylgalactoside transmembrane transporter activity; IDA:EcoCyc.
DR   GO; GO:0015769; P:melibiose transport; IDA:EcoCyc.
DR   GO; GO:0015765; P:methylgalactoside transport; IDA:EcoCyc.
DR   GO; GO:0071702; P:organic substance transport; IBA:GO_Central.
DR   Gene3D; 1.20.1250.20; -; 1.
DR   InterPro; IPR039672; MFS_2.
DR   InterPro; IPR036259; MFS_trans_sf.
DR   InterPro; IPR001927; Na/Gal_symport.
DR   InterPro; IPR018043; Na/Gal_symport_CS.
DR   PANTHER; PTHR11328; PTHR11328; 1.
DR   SUPFAM; SSF103473; SSF103473; 1.
DR   TIGRFAMs; TIGR00792; gph; 1.
DR   PROSITE; PS00872; NA_GALACTOSIDE_SYMP; 1.
PE   1: Evidence at protein level;
KW   Cell inner membrane; Cell membrane; Direct protein sequencing; Membrane;
KW   Reference proteome; Sugar transport; Symport; Transmembrane;
KW   Transmembrane helix; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:7703254"
FT   CHAIN           2..473
FT                   /note="Melibiose permease"
FT                   /id="PRO_0000170752"
FT   TOPO_DOM        2..16
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:1730719,
FT                   ECO:0000269|PubMed:8672452"
FT   TRANSMEM        17..37
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        38..39
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        40..60
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        61..77
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        78..98
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        99..105
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        106..126
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        127..150
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        151..171
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        172..183
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        184..204
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        205..232
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        233..253
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        254..266
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        267..287
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        288..296
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        297..317
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        318..325
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        326..346
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        347..378
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        379..399
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        400..407
FT                   /note="Periplasmic"
FT                   /evidence="ECO:0000269|PubMed:8672452"
FT   TRANSMEM        408..428
FT                   /note="Helical"
FT                   /evidence="ECO:0000305|PubMed:8672452"
FT   TOPO_DOM        429..473
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:15919996,
FT                   ECO:0000269|PubMed:1730719, ECO:0000269|PubMed:8672452"
FT   SITE            141
FT                   /note="Important for activity"
FT                   /evidence="ECO:0000305|PubMed:12421811"
FT   MUTAGEN         18
FT                   /note="K->C: Abolishes transporter activity."
FT                   /evidence="ECO:0000269|PubMed:11444849"
FT   MUTAGEN         19
FT                   /note="D->C: Abolishes transporter activity. Can bind
FT                   Na(+). Large decrease in the affinity for melibiose in the
FT                   presence of H(+)."
FT                   /evidence="ECO:0000269|PubMed:11444849,
FT                   ECO:0000269|PubMed:21135207"
FT   MUTAGEN         35
FT                   /note="D->C: Abolishes transporter activity."
FT                   /evidence="ECO:0000269|PubMed:11444849"
FT   MUTAGEN         52
FT                   /note="R->C: Abolishes transporter activity."
FT                   /evidence="ECO:0000269|PubMed:11444849"
FT   MUTAGEN         55
FT                   /note="D->C: Abolishes transporter activity. Chemical
FT                   restoration of the charge via the oxidation of the thiol to
FT                   the sulfinic and/or sulfonic acid results in partial
FT                   recovery of transporter activity. Does not bind Na(+).
FT                   Binds melibiose in the presence of H(+)."
FT                   /evidence="ECO:0000269|PubMed:11444849,
FT                   ECO:0000269|PubMed:21135207"
FT   MUTAGEN         59
FT                   /note="D->C: Loses ability to catalyze Na(+) or H(+)-
FT                   coupled melibiose transport against a concentration
FT                   gradient. Does not bind Na(+). Binds melibiose in the
FT                   presence of H(+)."
FT                   /evidence="ECO:0000269|PubMed:11444849,
FT                   ECO:0000269|PubMed:1872836, ECO:0000269|PubMed:21135207"
FT   MUTAGEN         124
FT                   /note="D->C: Abolishes transporter activity. Chemical
FT                   restoration of the charge via the oxidation of the thiol to
FT                   the sulfinic and/or sulfonic acid results in partial
FT                   recovery of transporter activity. Can bind Na(+), but
FT                   structural changes induced by Na(+) are less complete and
FT                   of smaller amplitude. Large decrease in the affinity for
FT                   melibiose in the presence of H(+)."
FT                   /evidence="ECO:0000269|PubMed:11444849,
FT                   ECO:0000269|PubMed:21135207"
FT   MUTAGEN         138
FT                   /note="K->C: Can transport melibiose."
FT                   /evidence="ECO:0000269|PubMed:12421811"
FT   MUTAGEN         139
FT                   /note="R->C: Can transport melibiose."
FT                   /evidence="ECO:0000269|PubMed:12421811"
FT   MUTAGEN         141
FT                   /note="R->C,Q: Abolishes melibiose transport. Decreases
FT                   affinity for melibiose."
FT                   /evidence="ECO:0000269|PubMed:12421811"
FT   MUTAGEN         141
FT                   /note="R->K: Retains ion-coupled melibiose transport."
FT                   /evidence="ECO:0000269|PubMed:12421811"
FT   MUTAGEN         149
FT                   /note="R->C: Abolishes melibiose transport."
FT                   /evidence="ECO:0000269|PubMed:12421811"
FT   MUTAGEN         149
FT                   /note="R->K,Q: Retains ion-coupled melibiose transport."
FT                   /evidence="ECO:0000269|PubMed:12421811"
FT   MUTAGEN         199
FT                   /note="R->C: Does not affect transporter activity."
FT                   /evidence="ECO:0000269|PubMed:11444849"
FT   MUTAGEN         203
FT                   /note="E->C: Does not affect transporter activity."
FT                   /evidence="ECO:0000269|PubMed:11444849"
SQ   SEQUENCE   473 AA;  52636 MW;  E05FAA436F4CA70C CRC64;
     MSISMTTKLS YGFGAFGKDF AIGIVYMYLM YYYTDVVGLS VGLVGTLFLV ARIWDAINDP
     IMGWIVNATR SRWGKFKPWI LIGTLANSVI LFLLFSAHLF EGTTQIVFVC VTYILWGMTY
     TIMDIPFWSL VPTITLDKRE REQLVPYPRF FASLAGFVTA GVTLPFVNYV GGGDRGFGFQ
     MFTLVLIAFF IVSTIITLRN VHEVFSSDNQ PSAEGSHLTL KAIVALIYKN DQLSCLLGMA
     LAYNVASNII TGFAIYYFSY VIGDADLFPY YLSYAGAANL VTLVFFPRLV KSLSRRILWA
     GASILPVLSC GVLLLMALMS YHNVVLIVIA GILLNVGTAL FWVLQVIMVA DIVDYGEYKL
     HVRCESIAYS VQTMVVKGGS AFAAFFIAVV LGMIGYVPNV EQSTQALLGM QFIMIALPTL
     FFMVTLILYF RFYRLNGDTL RRIQIHLLDK YRKVPPEPVH ADIPVGAVSD VKA
 
 
维奥蛋白资源库 - 中文蛋白资源 CopyRight © 2010-2024