ID   MATK_EPHSI              Reviewed;         531 AA.
AC   Q8MEX3;
DT   21-JUN-2005, integrated into UniProtKB/Swiss-Prot.
DT   21-JUN-2005, sequence version 2.
DT   25-MAY-2022, entry version 53.
DE   RecName: Full=Maturase K {ECO:0000255|HAMAP-Rule:MF_01390};
DE   AltName: Full=Intron maturase {ECO:0000255|HAMAP-Rule:MF_01390};
GN   Name=matK {ECO:0000255|HAMAP-Rule:MF_01390};
OS   Ephedra sinica (Chinese ephedra) (Ma huang).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Gnetopsida; Gnetidae; Ephedrales; Ephedraceae; Ephedra.
OX   NCBI_TaxID=33152;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Chaw S.-M., Hu S.-H.;
RT   "Chloroplast matK sequence data reconfirm the monophyly of extant
RT   gymnosperms and the coniferophytic origin of Gnetales.";
RL   Submitted (JUN-2000) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Usually encoded in the trnK tRNA gene intron. Probably
CC       assists in splicing its own and other chloroplast group II introns.
CC       {ECO:0000255|HAMAP-Rule:MF_01390}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast.
CC   -!- SIMILARITY: Belongs to the intron maturase 2 family. MatK subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01390}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=AAK69128.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; AF279805; AAK69128.1; ALT_INIT; Genomic_DNA.
DR   AlphaFoldDB; Q8MEX3; -.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0006397; P:mRNA processing; IEA:UniProtKB-KW.
DR   GO; GO:0008380; P:RNA splicing; IEA:UniProtKB-UniRule.
DR   GO; GO:0008033; P:tRNA processing; IEA:UniProtKB-KW.
DR   HAMAP; MF_01390; MatK; 1.
DR   InterPro; IPR024937; Domain_X.
DR   InterPro; IPR002866; Maturase_MatK.
DR   InterPro; IPR024942; Maturase_MatK_N.
DR   PANTHER; PTHR34811; PTHR34811; 1.
DR   Pfam; PF01348; Intron_maturas2; 1.
DR   Pfam; PF01824; MatK_N; 1.
PE   3: Inferred from homology;
KW   Chloroplast; mRNA processing; Plastid; RNA-binding; tRNA processing.
FT   CHAIN           1..531
FT                   /note="Maturase K"
FT                   /id="PRO_0000143373"
SQ   SEQUENCE   531 AA;  64382 MW;  611DE8DEA7FB19AE CRC64;
     MCYFISKKKG LGGFFLKKNE NIRWQQHFLY PLLFHNDFYV IDPNLLFNSS PSFEKIEKLP
     NSFRFLNVKR SIKLLHQQNY LVYNTRSSCF NFIGKTFFFC FDIFVSTWWK HFFGFKVTFK
     EINQQVNFQS VFSLFLFLEE VFMFSLSFSN IRIPSSIHSE LLIRRFKFSI QDVSFLHFLS
     FILFSKQFKF VNNSIIFPRG NVIFCFFLGN ILLSIFEDFF TLRWKSCFHE KSLSYGLFSE
     QKHFQQKWNF LTRKPKKKDT IRLLKDFFFH YIRYGEKLIL LGTTILVKKC EFFFLNFWQT
     YLFVLSEPSS FFLKQISSQN IFFLAYYLEY PTNSFLLRLN ILDYFLSTDF VGRELNSKLS
     AVFVIQFLSK EGLCDIMGNP KSKLAWLSFT DNSILDKYDH FCRNVDSFYS EAINKRFLDR
     VKDILFLSCI KTLACKHKST IRIVRKELGF ELRKIFVRKQ VEFKNKKLLY FCFHKQFRKL
     LFKIDLVTER LWFLDILEVN NFTKFWVKQQ NALDFFFIFD QNIWFMLDQF L