ID   ENDA_NATPD              Reviewed;         336 AA.
AC   Q3IU70;
DT   13-NOV-2007, integrated into UniProtKB/Swiss-Prot.
DT   08-NOV-2005, sequence version 1.
DT   03-AUG-2022, entry version 97.
DE   RecName: Full=tRNA-splicing endonuclease {ECO:0000255|HAMAP-Rule:MF_01834};
DE            EC=4.6.1.16 {ECO:0000255|HAMAP-Rule:MF_01834};
DE   AltName: Full=tRNA-intron endonuclease {ECO:0000255|HAMAP-Rule:MF_01834};
GN   Name=endA {ECO:0000255|HAMAP-Rule:MF_01834}; OrderedLocusNames=NP_0444A;
OS   Natronomonas pharaonis (strain ATCC 35678 / DSM 2160 / CIP 103997 / JCM
OS   8858 / NBRC 14720 / NCIMB 2260 / Gabara) (Halobacterium pharaonis).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Halobacteriales;
OC   Haloarculaceae; Natronomonas.
OX   NCBI_TaxID=348780;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 35678 / DSM 2160 / CIP 103997 / JCM 8858 / NBRC 14720 / NCIMB
RC   2260 / Gabara;
RX   PubMed=16169924; DOI=10.1101/gr.3952905;
RA   Falb M., Pfeiffer F., Palm P., Rodewald K., Hickmann V., Tittor J.,
RA   Oesterhelt D.;
RT   "Living with two extremes: conclusions from the genome sequence of
RT   Natronomonas pharaonis.";
RL   Genome Res. 15:1336-1343(2005).
CC   -!- FUNCTION: Endonuclease that removes tRNA introns. Cleaves pre-tRNA at
CC       the 5'- and 3'-splice sites to release the intron. The products are an
CC       intron and two tRNA half-molecules bearing 2',3' cyclic phosphate and
CC       5'-OH termini. Recognizes a pseudosymmetric substrate in which 2 bulged
CC       loops of 3 bases are separated by a stem of 4 bp (By similarity).
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=pretRNA = a 3'-half-tRNA molecule with a 5'-OH end + a 5'-
CC         half-tRNA molecule with a 2',3'-cyclic phosphate end + an intron with
CC         a 2',3'-cyclic phosphate and a 5'-hydroxyl terminus.; EC=4.6.1.16;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01834};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01834}.
CC   -!- SIMILARITY: Belongs to the tRNA-intron endonuclease family. Archaeal
CC       long subfamily. {ECO:0000255|HAMAP-Rule:MF_01834}.
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DR   EMBL; CR936257; CAI48313.1; -; Genomic_DNA.
DR   RefSeq; WP_011321949.1; NC_007426.1.
DR   AlphaFoldDB; Q3IU70; -.
DR   SMR; Q3IU70; -.
DR   STRING; 348780.NP_0444A; -.
DR   EnsemblBacteria; CAI48313; CAI48313; NP_0444A.
DR   GeneID; 3702672; -.
DR   KEGG; nph:NP_0444A; -.
DR   eggNOG; arCOG01701; Archaea.
DR   HOGENOM; CLU_791347_0_0_2; -.
DR   OMA; GADFRTY; -.
DR   OrthoDB; 110254at2157; -.
DR   Proteomes; UP000002698; Chromosome.
DR   GO; GO:0016829; F:lyase activity; IEA:UniProtKB-KW.
DR   GO; GO:0003676; F:nucleic acid binding; IEA:InterPro.
DR   GO; GO:0000213; F:tRNA-intron endonuclease activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006388; P:tRNA splicing, via endonucleolytic cleavage and ligation; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.1350.10; -; 2.
DR   HAMAP; MF_01834; EndA_long; 1.
DR   InterPro; IPR011856; tRNA_endonuc-like_dom_sf.
DR   InterPro; IPR036167; tRNA_intron_Endo_cat-like_sf.
DR   InterPro; IPR006677; tRNA_intron_Endonuc_cat-like.
DR   InterPro; IPR006678; tRNA_intron_Endonuc_N.
DR   InterPro; IPR036740; tRNA_intron_Endonuc_N_sf.
DR   InterPro; IPR006676; tRNA_splic.
DR   InterPro; IPR023516; tRNA_splic_arch_long.
DR   PANTHER; PTHR21227; PTHR21227; 1.
DR   Pfam; PF01974; tRNA_int_endo; 1.
DR   Pfam; PF02778; tRNA_int_endo_N; 2.
DR   SUPFAM; SSF53032; SSF53032; 2.
DR   SUPFAM; SSF55267; SSF55267; 2.
DR   TIGRFAMs; TIGR00324; endA; 1.
PE   3: Inferred from homology;
KW   Lyase; Reference proteome; tRNA processing.
FT   CHAIN           1..336
FT                   /note="tRNA-splicing endonuclease"
FT                   /id="PRO_0000309820"
FT   ACT_SITE        271
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01834"
FT   ACT_SITE        282
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01834"
FT   ACT_SITE        313
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01834"
SQ   SEQUENCE   336 AA;  36543 MW;  F5BA9A0C581055A6 CRC64;
     MEGHLSDGLV EVGPNGRERY YDSSGYGRPD GAGVRLAPVE AAYLLARGDL DAVDGMGLEA
     FLADTPDLVV PFLVYRDLRE RGFYVSPALE GWVADHAGID FVVHPRGDGP WDGTVAYRVR
     VVDERGSVRL DSLGDVVLAV VDEESELTYL ETDRPAVDGT SGLEADLTAD GVLLEDRVLC
     WDAPPALYEQ GFYGQRMDRE DGPLQLSLLE AAHLAATGVL SVAGGAAAVE ARGRDAEGER
     FDRRLTVYRT LRERGVVPKT GFKFGADFRT YADVDSVSEL GHSELLVRVL PADATLSPRD
     VALDVRLAHG VRKRMVFALV DDGDEIRWVS VSRLTP