ID   MATK_SINAL              Reviewed;         502 AA.
AC   P09364;
DT   01-JUL-1989, integrated into UniProtKB/Swiss-Prot.
DT   17-JAN-2003, sequence version 2.
DT   25-MAY-2022, entry version 77.
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}; Synonyms=ycf14;
OS   Sinapis alba (White mustard) (Brassica hirta).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; malvids; Brassicales; Brassicaceae; Brassiceae; Sinapis.
OX   NCBI_TaxID=3728;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2834093; DOI=10.1007/bf00355398;
RA   Neuhaus H., Link G.;
RT   "The chloroplast tRNALys(UUU) gene from mustard (Sinapis alba) contains a
RT   class II intron potentially coding for a maturase-related polypeptide.";
RL   Curr. Genet. 11:251-257(1987).
RN   [2]
RP   TRNA-BINDING.
RX   PubMed=7537369; DOI=10.1093/nar/23.6.917;
RA   Liere K., Link G.;
RT   "RNA-binding activity of the matK protein encoded by the chloroplast trnK
RT   intron from mustard (Sinapis alba L.).";
RL   Nucleic Acids Res. 23:917-921(1995).
CC   -!- FUNCTION: Usually encoded in the trnK tRNA gene intron. Probably
CC       assists in splicing its own and other chloroplast group II introns (By
CC       similarity). Binds its homologous trnK precursor transcript.
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=CAA28509.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; X04826; CAA28509.1; ALT_INIT; Genomic_DNA.
DR   PIR; S07168; S07168.
DR   AlphaFoldDB; P09364; -.
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   1: Evidence at protein level;
KW   Chloroplast; mRNA processing; Plastid; RNA-binding; tRNA processing.
FT   CHAIN           1..502
FT                   /note="Maturase K"
FT                   /id="PRO_0000143709"
SQ   SEQUENCE   502 AA;  60156 MW;  BB87DA977FF834EB CRC64;
     MEKFQGYLEF DGARQQSFLY PLFFREYIYV LSYDHGLNRL NRNRSIFLEN ADYDKKYSSL
     IVKRLILRMY EQNRLIIPTK DLNTNLGHTN LFYYQMISVL FAVIVEIPFS LRLGSSFEGK
     NLKKSYNLQS IHSIFPFLED KFSHFNYVLD VLIPYPIHLE ILVQTLRYRV KDASSLHFFR
     FCLYEYCNWK NFDSKKKSIL NPRFFLFLYN SHVCEYESIF FFLRKQSSHL RSTSYEVFFE
     RILFYGKIQH FLKVFVNNFP AILGLLKDPF LHYVRYHGKY ILATKDTPLM MNKWKYYFVN
     LWQCYFSVWF QSQKININQL SKDNFEFLGY FSSLRLNSLV VRSQMLENSF LIDNVRRKLD
     SNIQISSIIG SLAKDKFCNV LGHPISKATW MDSSDSDILN RFVRICRNIS HYYSGSAKKK
     NLYRIKYILR LCCVKTLARK HKSTVRAFLK RLGSGLLEEF LTGEDQVLSL IFPRSDYASK
     RLYRVRVWYL DILYLNDLVN HE