ID   NDUS7_SOLTU             Reviewed;         213 AA.
AC   Q43844;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   16-JUN-2009, entry version 56.
DE   RecName: Full=NADH-ubiquinone oxidoreductase 20 kDa subunit, mitochondrial;
DE            EC=1.6.5.3;
DE            EC=1.6.99.3;
DE   AltName: Full=Complex I-20 kDa;
DE            Short=CI-20kD;
DE   Flags: Precursor;
OS   Solanum tuberosum (Potato).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliophyta; eudicotyledons; core eudicotyledons;
OC   asterids; lamiids; Solanales; Solanaceae; Solanoideae; Solaneae;
OC   Solanum.
OX   NCBI_TaxID=4113;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. Desiree; TISSUE=Leaf;
RX   MEDLINE=97071689; PubMed=8914535; DOI=10.1007/BF00040836;
RA   Heiser V., Grohmann L., Brennicke A.;
RT   "The plant mitochondrial 22 kDa (PSST) subunit of respiratory chain
RT   complex I is encoded by a nuclear gene with enhanced transcript levels
RT   in flowers.";
RL   Plant Mol. Biol. 31:1195-1204(1996).
CC   -!- FUNCTION: Core subunit of the mitochondrial membrane respiratory
CC       chain NADH dehydrogenase (Complex I) that is believed to belong to
CC       the minimal assembly required for catalysis. Complex I functions
CC       in the transfer of electrons from NADH to the respiratory chain.
CC       The immediate electron acceptor for the enzyme is believed to be
CC       ubiquinone (By similarity).
CC   -!- CATALYTIC ACTIVITY: NADH + ubiquinone = NAD(+) + ubiquinol.
CC   -!- CATALYTIC ACTIVITY: NADH + acceptor = NAD(+) + reduced acceptor.
CC   -!- COFACTOR: Binds 1 4Fe-4S cluster (Potential).
CC   -!- SUBUNIT: Complex I is composed of 45 different subunits This is a
CC       component of the iron-sulfur (IP) fragment of the enzyme (By
CC       similarity).
CC   -!- SUBCELLULAR LOCATION: Mitochondrion.
CC   -!- SIMILARITY: Belongs to the complex I 20 kDa subunit family.
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DR   EMBL; X96671; CAA65451.1; -; mRNA.
DR   PIR; T07603; T07603.
DR   BRENDA; 1.6.5.3; 296.
DR   BRENDA; 1.6.99.3; 296.
DR   GO; GO:0005739; C:mitochondrion; IEA:UniProtKB-SubCell.
DR   GO; GO:0070469; C:respiratory chain; IEA:UniProtKB-KW.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:EC.
DR   GO; GO:0048038; F:quinone binding; IEA:InterPro.
DR   GO; GO:0022900; P:electron transport chain; IEA:UniProtKB-KW.
DR   GO; GO:0006810; P:transport; IEA:UniProtKB-KW.
DR   InterPro; IPR006137; NADH_UbQ_OxRdtase-like_20kDa.
DR   InterPro; IPR006138; NADH_UbQ_OxRdtase_su-20kDa.
DR   InterPro; IPR014406; NiFe_hyd_3_ssu/Q_oxred_NuoB.
DR   PANTHER; PTHR11995:SF2; NADH_DH_20kDa; 1.
DR   PANTHER; PTHR11995; NiFe_hyd_3_ssu/Q_oxred_NuoB; 1.
DR   Pfam; PF01058; Oxidored_q6; 1.
DR   TIGRFAMs; TIGR01957; nuoB_fam; 1.
DR   PROSITE; PS01150; COMPLEX1_20K; 1.
PE   2: Evidence at transcript level;
KW   4Fe-4S; Electron transport; Iron; Iron-sulfur; Metal-binding;
KW   Mitochondrion; NAD; Oxidoreductase; Respiratory chain;
KW   Transit peptide; Transport; Ubiquinone.
FT   TRANSIT       1     31       Mitochondrion (Potential).
FT   CHAIN        32    213       NADH-ubiquinone oxidoreductase 20 kDa
FT                                subunit, mitochondrial.
FT                                /FTId=PRO_0000020035.
FT   METAL        88     88       Iron-sulfur (4Fe-4S) (Potential).
FT   METAL        89     89       Iron-sulfur (4Fe-4S) (Potential).
FT   METAL       153    153       Iron-sulfur (4Fe-4S) (Potential).
FT   METAL       183    183       Iron-sulfur (4Fe-4S) (Potential).
SQ   SEQUENCE   213 AA;  23396 MW;  8047FAB323418FCB CRC64;
     MALIARNAKL LTGTAPFLQR AATIHTTLPS LSQQPASSPA TSGGAQPPSM NTPAGISKPA
     EYVISKVDDL MNWARRGSIW PMTFGLACCA VEMMHAGAAR YDFDRFGIIF RPSPRQSDVM
     IVAGTLTNKM APALRKVYDQ MPEPRWVISM GSCANGGGYY HYSYAVVRGC DRIVPVDIYV
     PGCPPTAEAL LYGILQLQKK INRRKDLLMW WTQ
//