ID   LIPB_RUBXD              Reviewed;         221 AA.
AC   Q1AT14;
DT   26-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   11-JUL-2006, sequence version 1.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=Octanoyltransferase {ECO:0000255|HAMAP-Rule:MF_00013};
DE            EC=2.3.1.181 {ECO:0000255|HAMAP-Rule:MF_00013};
DE   AltName: Full=Lipoate-protein ligase B {ECO:0000255|HAMAP-Rule:MF_00013};
DE   AltName: Full=Lipoyl/octanoyl transferase {ECO:0000255|HAMAP-Rule:MF_00013};
DE   AltName: Full=Octanoyl-[acyl-carrier-protein]-protein N-octanoyltransferase {ECO:0000255|HAMAP-Rule:MF_00013};
GN   Name=lipB {ECO:0000255|HAMAP-Rule:MF_00013}; OrderedLocusNames=Rxyl_2547;
OS   Rubrobacter xylanophilus (strain DSM 9941 / NBRC 16129 / PRD-1).
OC   Bacteria; Actinobacteria; Rubrobacteria; Rubrobacterales; Rubrobacteraceae;
OC   Rubrobacter.
OX   NCBI_TaxID=266117;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 9941 / NBRC 16129 / PRD-1;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Munk A.C., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Lykidis A., da Costa M.S.,
RA   Rainey F.A., Empadinhas N., Jolivet E., Battista J.R., Richardson P.;
RT   "Complete sequence of Rubrobacter xylanophilus DSM 9941.";
RL   Submitted (JUN-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the transfer of endogenously produced octanoic acid
CC       from octanoyl-acyl-carrier-protein onto the lipoyl domains of lipoate-
CC       dependent enzymes. Lipoyl-ACP can also act as a substrate although
CC       octanoyl-ACP is likely to be the physiological substrate.
CC       {ECO:0000255|HAMAP-Rule:MF_00013}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-lysyl-[protein] + octanoyl-[ACP] = H(+) + holo-[ACP] + N(6)-
CC         octanoyl-L-lysyl-[protein]; Xref=Rhea:RHEA:17665, Rhea:RHEA-
CC         COMP:9636, Rhea:RHEA-COMP:9685, Rhea:RHEA-COMP:9752, Rhea:RHEA-
CC         COMP:9928, ChEBI:CHEBI:15378, ChEBI:CHEBI:29969, ChEBI:CHEBI:64479,
CC         ChEBI:CHEBI:78463, ChEBI:CHEBI:78809; EC=2.3.1.181;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00013};
CC   -!- PATHWAY: Protein modification; protein lipoylation via endogenous
CC       pathway; protein N(6)-(lipoyl)lysine from octanoyl-[acyl-carrier-
CC       protein]: step 1/2. {ECO:0000255|HAMAP-Rule:MF_00013}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00013}.
CC   -!- MISCELLANEOUS: In the reaction, the free carboxyl group of octanoic
CC       acid is attached via an amide linkage to the epsilon-amino group of a
CC       specific lysine residue of lipoyl domains of lipoate-dependent enzymes.
CC       {ECO:0000255|HAMAP-Rule:MF_00013}.
CC   -!- SIMILARITY: Belongs to the LipB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00013}.
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DR   EMBL; CP000386; ABG05464.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q1AT14; -.
DR   SMR; Q1AT14; -.
DR   STRING; 266117.Rxyl_2547; -.
DR   EnsemblBacteria; ABG05464; ABG05464; Rxyl_2547.
DR   KEGG; rxy:Rxyl_2547; -.
DR   eggNOG; COG0321; Bacteria.
DR   HOGENOM; CLU_035168_1_3_11; -.
DR   OMA; GEVTYHC; -.
DR   PhylomeDB; Q1AT14; -.
DR   UniPathway; UPA00538; UER00592.
DR   Proteomes; UP000006637; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0033819; F:lipoyl(octanoyl) transferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0009249; P:protein lipoylation; IEA:InterPro.
DR   CDD; cd16444; LipB; 1.
DR   Gene3D; 3.30.930.10; -; 1.
DR   HAMAP; MF_00013; LipB; 1.
DR   InterPro; IPR045864; aa-tRNA-synth_II/BPL/LPL.
DR   InterPro; IPR004143; BPL_LPL_catalytic.
DR   InterPro; IPR000544; Octanoyltransferase.
DR   InterPro; IPR020605; Octanoyltransferase_CS.
DR   PIRSF; PIRSF016262; LPLase; 1.
DR   SUPFAM; SSF55681; SSF55681; 1.
DR   TIGRFAMs; TIGR00214; lipB; 1.
DR   PROSITE; PS51733; BPL_LPL_CATALYTIC; 1.
DR   PROSITE; PS01313; LIPB; 1.
PE   3: Inferred from homology;
KW   Acyltransferase; Cytoplasm; Reference proteome; Transferase.
FT   CHAIN           1..221
FT                   /note="Octanoyltransferase"
FT                   /id="PRO_0000321667"
FT   DOMAIN          38..220
FT                   /note="BPL/LPL catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01067"
FT   ACT_SITE        181
FT                   /note="Acyl-thioester intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00013"
FT   BINDING         84..91
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00013"
FT   BINDING         149..151
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00013"
FT   BINDING         163..165
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00013"
FT   SITE            146
FT                   /note="Lowers pKa of active site Cys"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00013"
SQ   SEQUENCE   221 AA;  24712 MW;  340480E7923447A5 CRC64;
     MELEERRAAL DVRRLPGLTP YAEAWELQRE LVRKRRSGEI PDTLLLLEHP PVYTVGRAAR
     DASNLGAGEE YLRSLGAEVF WSDRGGDATF HGPGQLVGYP IIRLKVRDTH RYLRDLEEVV
     IRALAGYGLE GRRHPRYTGV WVNGSKICAI GVKFSSGWIA SHGFALNVNT DLSWFDRITP
     CGIREYGVTS LERELGREIP LAGVEREIVS GFREVLGDPG S