NU2C_SYNY3
ID NU2C_SYNY3 Reviewed; 521 AA.
AC P72714; Q55269;
DT 01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-1997, sequence version 1.
DT 25-MAY-2022, entry version 131.
DE RecName: Full=NAD(P)H-quinone oxidoreductase subunit 2 {ECO:0000255|HAMAP-Rule:MF_00445};
DE EC=7.1.1.- {ECO:0000255|HAMAP-Rule:MF_00445};
DE AltName: Full=NAD(P)H dehydrogenase subunit 2 {ECO:0000255|HAMAP-Rule:MF_00445};
DE AltName: Full=NADH-plastoquinone oxidoreductase subunit 2 {ECO:0000255|HAMAP-Rule:MF_00445};
DE AltName: Full=NDH-1, subunit 2 {ECO:0000255|HAMAP-Rule:MF_00445};
GN Name=ndhB {ECO:0000255|HAMAP-Rule:MF_00445}; OrderedLocusNames=sll0223;
OS Synechocystis sp. (strain PCC 6803 / Kazusa).
OC Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC unclassified Synechocystis.
OX NCBI_TaxID=1111708;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=1903537; DOI=10.1073/pnas.88.10.4275;
RA Ogawa T.;
RT "A gene homologous to the subunit-2 gene of NADH dehydrogenase is essential
RT to inorganic carbon transport of Synechocystis PCC6803.";
RL Proc. Natl. Acad. Sci. U.S.A. 88:4275-4279(1991).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 6803 / Kazusa;
RX PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT "Sequence analysis of the genome of the unicellular cyanobacterium
RT Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT genome and assignment of potential protein-coding regions.";
RL DNA Res. 3:109-136(1996).
CC -!- FUNCTION: NDH-1 shuttles electrons from an unknown electron donor, via
CC FMN and iron-sulfur (Fe-S) centers, to quinones in the respiratory
CC and/or the photosynthetic chain. The immediate electron acceptor for
CC the enzyme in this species is believed to be plastoquinone. Couples the
CC redox reaction to proton translocation, and thus conserves the redox
CC energy in a proton gradient. Cyanobacterial NDH-1 also plays a role in
CC inorganic carbon-concentration. {ECO:0000255|HAMAP-Rule:MF_00445}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a plastoquinone + (n+1) H(+)(in) + NADH = a plastoquinol + n
CC H(+)(out) + NAD(+); Xref=Rhea:RHEA:42608, Rhea:RHEA-COMP:9561,
CC Rhea:RHEA-COMP:9562, ChEBI:CHEBI:15378, ChEBI:CHEBI:17757,
CC ChEBI:CHEBI:57540, ChEBI:CHEBI:57945, ChEBI:CHEBI:62192;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00445};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a plastoquinone + (n+1) H(+)(in) + NADPH = a plastoquinol + n
CC H(+)(out) + NADP(+); Xref=Rhea:RHEA:42612, Rhea:RHEA-COMP:9561,
CC Rhea:RHEA-COMP:9562, ChEBI:CHEBI:15378, ChEBI:CHEBI:17757,
CC ChEBI:CHEBI:57783, ChEBI:CHEBI:58349, ChEBI:CHEBI:62192;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00445};
CC -!- SUBUNIT: NDH-1 can be composed of about 15 different subunits;
CC different subcomplexes with different compositions have been identified
CC which probably have different functions. {ECO:0000255|HAMAP-
CC Rule:MF_00445}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_00445}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_00445}.
CC -!- SIMILARITY: Belongs to the complex I subunit 2 family.
CC {ECO:0000255|HAMAP-Rule:MF_00445}.
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DR EMBL; D90288; BAA14330.1; -; Genomic_DNA.
DR EMBL; BA000022; BAA16721.1; -; Genomic_DNA.
DR PIR; S74569; S74569.
DR AlphaFoldDB; P72714; -.
DR SMR; P72714; -.
DR IntAct; P72714; 9.
DR STRING; 1148.1651794; -.
DR PaxDb; P72714; -.
DR EnsemblBacteria; BAA16721; BAA16721; BAA16721.
DR KEGG; syn:sll0223; -.
DR eggNOG; COG1007; Bacteria.
DR InParanoid; P72714; -.
DR OMA; FYIRVIV; -.
DR PhylomeDB; P72714; -.
DR Proteomes; UP000001425; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:InterPro.
DR GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR GO; GO:0042773; P:ATP synthesis coupled electron transport; IEA:InterPro.
DR GO; GO:0019684; P:photosynthesis, light reaction; IEA:UniProtKB-UniRule.
DR HAMAP; MF_00445; NDH1_NuoN_1; 1.
DR InterPro; IPR010096; NADH-Q_OxRdtase_suN/2.
DR InterPro; IPR001750; ND/Mrp_mem.
DR InterPro; IPR045693; Ndh2_N.
DR Pfam; PF19530; Ndh2_N; 1.
DR Pfam; PF00361; Proton_antipo_M; 1.
DR TIGRFAMs; TIGR01770; NDH_I_N; 1.
PE 3: Inferred from homology;
KW Membrane; NAD; NADP; Plastoquinone; Quinone; Reference proteome; Thylakoid;
KW Translocase; Transmembrane; Transmembrane helix; Transport.
FT CHAIN 1..521
FT /note="NAD(P)H-quinone oxidoreductase subunit 2"
FT /id="PRO_0000117685"
FT TRANSMEM 16..36
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 40..60
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 80..100
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 110..130
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 133..153
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 168..188
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 212..232
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 246..266
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 280..300
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 308..328
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 336..356
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 380..400
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 402..422
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 468..488
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT CONFLICT 412
FT /note="G -> R (in Ref. 1; BAA14330)"
FT /evidence="ECO:0000305"
SQ SEQUENCE 521 AA; 55355 MW; C18C06704C277081 CRC64;
MDFSSNVAAQ LNAGTILPEG IVIVTLLLVL IVDLIGGRKV ALALPYLAIA GLLVSVGLLV
TSWSMADPIG FIGAFNGDNL SIIFRAIIAL STVVTILMSV RYVQQTGTSL AEFIAILLTA
TLGGMFLSAA NELVMVFISL EMLSISSYLM TGYMKRDPRS NEAALKYLLI GASSSAIFLY
GLSLLYGLSG GETQLVLIAE KLVNADTVGQ SLGLAIALVF VIAGIAFKIS AVPFHQWTPD
VYEGSPTPVV AFLSVGSKAA GFAVAIRLLV TAFGGITDEW HVIFTALAVL SMVLGNVVAL
AQTSMKRMLA YSSIGQAGFV MIGLVAGSED GYASMVFYML IYLFMNLGAF SCIILFTLRT
GSDQISDYAG LYHKDPLLTL GLSICLLSLG GIPPLAGFFG KIYIFWAGWQ SGLYGLVLLG
LVTSVVSIYY YIRVVKMMVV KEPQEMSEVI KNYPAIKWNL PGMRPLQVGI VATLVATSLA
GILANPLFNL ATDSVVSTKM LQTALQQTGE TPAIAISHDL P
