NU2C_NEPOL
ID NU2C_NEPOL Reviewed; 506 AA.
AC Q9TL07;
DT 26-SEP-2001, integrated into UniProtKB/Swiss-Prot.
DT 01-MAY-2000, sequence version 1.
DT 03-AUG-2022, entry version 74.
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 Nephroselmis olivacea (Green alga).
OG Plastid; Chloroplast.
OC Eukaryota; Viridiplantae; Chlorophyta; Nephroselmidophyceae;
OC Nephroselmidales; Nephroselmidaceae; Nephroselmis.
OX NCBI_TaxID=31312;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NIES-484 / S-N-5-8;
RX PubMed=10468594; DOI=10.1073/pnas.96.18.10248;
RA Turmel M., Otis C., Lemieux C.;
RT "The complete chloroplast DNA sequence of the green alga Nephroselmis
RT olivacea: insights into the architecture of ancestral chloroplast
RT genomes.";
RL Proc. Natl. Acad. Sci. U.S.A. 96:10248-10253(1999).
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; AF137379; AAD54809.1; -; Genomic_DNA.
DR RefSeq; NP_050838.1; NC_000927.1.
DR AlphaFoldDB; Q9TL07; -.
DR SMR; Q9TL07; -.
DR GeneID; 801968; -.
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..506
FT /note="NAD(P)H-quinone oxidoreductase subunit 2,
FT chloroplastic"
FT /id="PRO_0000117668"
FT TRANSMEM 15..35
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 39..59
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 84..104
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 113..133
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 137..157
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 172..192
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 217..237
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 249..269
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 283..303
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 339..359
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 382..402
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 418..438
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
FT TRANSMEM 471..491
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00445"
SQ SEQUENCE 506 AA; 54338 MW; 073F8705BFFA22A7 CRC64;
MELSDILASF HASNLIPEGI VACTILLVLL LDLVYSRTCH AWLAWVAMAG LSLASVLLGQ
QWYQLMNLPT ATMTFGGSFQ ADSLSLVFRA IIAMSCVLCI LLSIDYVEST GTAPSEFLVL
IATASLGGML VAGSNDLLMM FVSLETLGLA SYLLTGYMKR DVRSNEASLK YLLVGAASSG
LFLYGISWMY GISGGHMELN SIAHAIVSLD ETKTTTCALA LVLMTVGVGF KVAAAPFHQW
TPDVYQGSPT PVVAFLSVGS KAAGFILAVR MCTTLFPSFN TEWHLIFTIL SILSMIVGNF
IAVTQTSLKR MLGYSSVGQA GVMMIGMLTD SPDGYASLIV YLLIYLFMNL GAFACVILFG
LRTGTDQIQD YSGLLARDPF LALCLSLCLL SLGGIPPLAG FFGKMYLFLA AWDAGQYSLV
WVGLITSVVS IYYYLSVVKI MLVPATQEMS LAVREYPRRA WSLEPIQPLE VGIFVCVLGS
ILVGVAGNSM VNLMTITMSQ APSLGV
