ID   TRHBN_MYCSM             Reviewed;         136 AA.
AC   P0A594; Q10784;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   15-MAR-2005, sequence version 1.
DT   03-AUG-2022, entry version 56.
DE   RecName: Full=Group 1 truncated hemoglobin GlbN;
DE   AltName: Full=Hemoglobin-like protein HbN;
DE   AltName: Full=Truncated hemoglobin;
DE            Short=trHbN;
GN   Name=glbN;
OS   Mycolicibacterium smegmatis (Mycobacterium smegmatis).
OC   Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC   Mycolicibacterium.
OX   NCBI_TaxID=1772;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=LR222;
RA   Kumar A., Rawat V.P.S., Das R.H.;
RT   "Cloning, expression and characterization of globin like genes of
RT   Mycobacterium in insect cells(sf9).";
RL   Submitted (SEP-1999) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Binds oxygen cooperatively with very high affinity because of
CC       a fast combination and a slow dissociation rate. {ECO:0000250}.
CC   -!- COFACTOR:
CC       Name=heme; Xref=ChEBI:CHEBI:30413; Evidence={ECO:0000250};
CC       Note=Binds 1 heme group per subunit. {ECO:0000250};
CC   -!- SUBUNIT: Homodimer. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the truncated hemoglobin family. Group I
CC       subfamily. {ECO:0000305}.
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DR   EMBL; AJ249386; CAB56291.1; -; Genomic_DNA.
DR   AlphaFoldDB; P0A594; -.
DR   BMRB; P0A594; -.
DR   SMR; P0A594; -.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0019825; F:oxygen binding; IEA:InterPro.
DR   GO; GO:0005344; F:oxygen carrier activity; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.490.10; -; 1.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012292; Globin/Proto.
DR   InterPro; IPR019795; Globin_bac-like_CS.
DR   InterPro; IPR001486; Hemoglobin_trunc.
DR   InterPro; IPR016339; Hemoglobin_trunc_I.
DR   Pfam; PF01152; Bac_globin; 1.
DR   PIRSF; PIRSF002030; Globin_Protozoa/Cyanobacteria; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   PROSITE; PS01213; GLOBIN_FAM_2; 1.
PE   3: Inferred from homology;
KW   Heme; Iron; Metal-binding; Oxygen transport; Transport.
FT   CHAIN           1..136
FT                   /note="Group 1 truncated hemoglobin GlbN"
FT                   /id="PRO_0000162639"
FT   BINDING         81
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="proximal binding residue"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   136 AA;  14449 MW;  B75D01A45BC064BB CRC64;
     MGLLSRLRKR EPISIYDKIG GHEAIEVVVE DFYVRVLADD QLSAFFSGTN MSRLKGKQVE
     FFAAALGGPE PYTGAPMKQV HQGRGITMHH FSLVAGHLAD ALTAAGVPSE TITEILGVIA
     PLAVDVTSGE STTAPV