NU2C_STAPU
ID NU2C_STAPU Reviewed; 513 AA.
AC Q32RW1;
DT 07-MAR-2006, integrated into UniProtKB/Swiss-Prot.
DT 06-DEC-2005, sequence version 1.
DT 25-MAY-2022, entry version 50.
DE RecName: Full=NAD(P)H-quinone oxidoreductase subunit 2, chloroplastic {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};
GN Name=ndhB {ECO:0000255|HAMAP-Rule:MF_00445};
OS Staurastrum punctulatum (Green alga) (Cosmoastrum punctulatum).
OG Plastid; Chloroplast.
OC Eukaryota; Viridiplantae; Streptophyta; Zygnemophyceae; Zygnematophycidae;
OC Desmidiales; Desmidiaceae; Staurastrum.
OX NCBI_TaxID=102822;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=16236178; DOI=10.1186/1741-7007-3-22;
RA Turmel M., Otis C., Lemieux C.;
RT "The complete chloroplast DNA sequences of the charophycean green algae
RT Staurastrum and Zygnema reveal that the chloroplast genome underwent
RT extensive changes during the evolution of the Zygnematales.";
RL BMC Biol. 3:22-22(2005).
CC -!- FUNCTION: NDH shuttles electrons from NAD(P)H:plastoquinone, via FMN
CC and iron-sulfur (Fe-S) centers, to quinones in the photosynthetic chain
CC and possibly in a chloroplast respiratory chain. The immediate electron
CC acceptor for the enzyme in this species is believed to be
CC plastoquinone. Couples the redox reaction to proton translocation, and
CC thus conserves the redox energy in a proton gradient.
CC {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 is composed of at least 16 different subunits, 5 of which
CC are encoded in the nucleus. {ECO:0000255|HAMAP-Rule:MF_00445}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000255|HAMAP-Rule:MF_00445}; Multi-pass membrane protein
CC {ECO:0000255|HAMAP-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; AY958085; AAX45698.1; -; Genomic_DNA.
DR RefSeq; YP_636415.1; NC_008116.1.
DR AlphaFoldDB; Q32RW1; -.
DR SMR; Q32RW1; -.
DR GeneID; 4108653; -.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
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 Chloroplast; Membrane; NAD; NADP; Plastid; Plastoquinone; Quinone;
KW Thylakoid; Translocase; Transmembrane; Transmembrane helix; Transport.
FT CHAIN 1..513
FT /note="NAD(P)H-quinone oxidoreductase subunit 2,
FT chloroplastic"
FT /id="PRO_0000225351"
FT TRANSMEM 11..31
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 38..58
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 78..98
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 112..132
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 167..187
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 219..239
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 256..276
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 290..310
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 318..338
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 348..368
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 389..409
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 422..442
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 478..498
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
SQ SEQUENCE 513 AA; 56091 MW; 09D9CFF5AF58BAD1 CRC64;
METNQLFSLD NLITILPECV LIICLLTILM IDVITKKSVW LSNIALLGLL TSTFILLFQL
TNNEVGFTAF LGSFQVDGFT IAFRCLLTLS SALCIPLSTE YIRRSGMTQA EFLILLLTAT
LGGMFLCGAN DLVTIFVSLE CLSLSSYLLA GQAKKDIRSN EASLKYLLMG GASSSILVYG
FSWLYGLSGG ELQLSKIVNG ISSQDIYLSS AVSLDGKTFG ALGLWVAFVC ILVGIGFKIS
AVPFHQWTPD VYEGSPTPVV AFLSVGSKAA GLALATRLLS IVFPAIEDQW HIVLEIVAFL
SMVFGNLIAA TQTSMKRMLA YSSISQAGYL LIAILVGNSD GYASMITYLL IYTFMNLGAF
ACTVIFGLRT GTDQIRDYTG LYLKDPWLAF ALSICLLSLA GMPPLAGFFG KLYLFWCGWQ
SHLYLLVYTG LITSVISLYY YLRVVKAMMT KEVKEMSTYV REYVTPSMSI FSSSSIELGL
TLCVLASSIL GFFMNPLIDV TKQSMLVNNF LVF
