HMOX2

Heme oxygenase 2
PDB rendering based on 2q32.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 2Q32​, 2QPP​, 2RGZ​, 4WMH​
Identifiers
Symbols	HMOX2 ; HO-2
External IDs	OMIM: 141251 MGI: 109373 HomoloGene: 1611 ChEMBL: 2546 GeneCards: HMOX2 Gene
EC number	1.14.99.3
Gene ontology Molecular function • heme oxygenase (decyclizing) activity • protein binding • metal ion binding Cellular component • endoplasmic reticulum membrane • plasma membrane • membrane Biological process • response to hypoxia • porphyrin-containing compound metabolic process • heme oxidation • cellular iron ion homeostasis • heme catabolic process • small molecule metabolic process • transmembrane transport Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	3163	15369
Ensembl	ENSG00000103415	ENSMUSG00000004070
UniProt	P30519	O70252
RefSeq (mRNA)	NM_001127204	NM_001136066
RefSeq (protein)	NP_001120676	NP_001129538
Location (UCSC)	Chr 16: 4.47 – 4.51 Mb	Chr 16: 4.73 – 4.77 Mb
PubMed search

Heme oxygenase 2 is an enzyme that in humans is encoded by the HMOX2 gene.^[1][2]

Function

Heme oxygenase, an essential enzyme in heme catabolism, cleaves heme to form biliverdin, which is subsequently converted to bilirubin by biliverdin reductase, and carbon monoxide, a putative neurotransmitter. Heme oxygenase activity is induced by its substrate heme and by various nonheme substances. Heme oxygenase occurs as 2 isozymes, an inducible heme oxygenase-1 and a constitutive heme oxygenase-2. HMOX1 and HMOX2 (this enzyme) belong to the heme oxygenase family.^[2]

References

1. McCoubrey WK, Ewing JF, Maines MD (Jun 1992). "Human heme oxygenase-2: characterization and expression of a full-length cDNA and evidence suggesting that the two HO-2 transcripts may differ by choice of polyadenylation signal". Arch Biochem Biophys 295 (1): 13–20. doi:10.1016/0003-9861(92)90481-B. PMID 1575508.
2. "Entrez Gene: HMOX2 heme oxygenase (decycling) 2".

Further reading

• Bianchetti CM, Yi L, Ragsdale SW, Phillips GN (2007). "Comparison of Apo- and Heme-bound Crystal Structures of a Truncated Human Heme Oxygenase-2". J Biol Chem. 282 (52): 37624–31. doi:10.1074/jbc.M707396200. PMC 2896506. PMID 17965015.
• Wang J, Zhuang H, Doré S (2006). "Heme oxygenase 2 is neuroprotective against intracerebral hemorrhage.". Neurobiol Dis. 22 (3): 473–6. doi:10.1016/j.nbd.2005.12.009. PMID 16459095.
• Wang J, Doré S (2008). "Heme oxygenase 2 deficiency increases brain swelling and inflammation after intracerebral hemorrhage.". Neuroscience 155 (4): 1133–41. doi:10.1016/j.neuroscience.2008.07.004. PMID 18674596.
• Barañano DE, Snyder SH (2001). "Neural roles for heme oxygenase: Contrasts to nitric oxide synthase". Proc. Natl. Acad. Sci. U.S.A. 98 (20): 10996–1002. doi:10.1073/pnas.191351298. PMC 58673. PMID 11572959.
• Doré S (2002). "Decreased activity of the antioxidant heme oxygenase enzyme: implications in ischemia and in Alzheimer's disease". Free Radic. Biol. Med. 32 (12): 1276–82. doi:10.1016/S0891-5849(02)00805-5. PMID 12057765.
• Kemp PJ (2005). "Hemeoxygenase-2 as an O2 sensor in K+ channel-dependent chemotransduction". Biochem. Biophys. Res. Commun. 338 (1): 648–52. doi:10.1016/j.bbrc.2005.08.110. PMID 16137652.
• Ishikawa K, Takeuchi N, Takahashi S, Matera KM, Sato M, Shibahara S, Rousseau DL, Ikeda-Saito M, Yoshida T (1995). "Heme oxygenase-2. Properties of the heme complex of the purified tryptic fragment of recombinant human heme oxygenase-2". J. Biol. Chem. 270 (11): 6345–50. doi:10.1074/jbc.270.11.6345. PMID 7890772.
• Kutty RK, Kutty G, Rodriguez IR, Chader GJ, Wiggert B (1994). "Chromosomal localization of the human heme oxygenase genes: heme oxygenase-1 (HMOX1) maps to chromosome 22q12 and heme oxygenase-2 (HMOX2) maps to chromosome 16p13.3". Genomics 20 (3): 513–6. doi:10.1006/geno.1994.1213. PMID 8034330.
• Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
• Takahashi K, Hara E, Suzuki H, Sasano H, Shibahara S (1996). "Expression of heme oxygenase isozyme mRNAs in the human brain and induction of heme oxygenase-1 by nitric oxide donors". J. Neurochem. 67 (2): 482–9. doi:10.1046/j.1471-4159.1996.67020482.x. PMID 8764571.
• Saito-Ohara F, Ikeuchi T, Matsumoto M, Kurata S (1997). "Assignment of the mouse heme oxygenase genes: heme oxygenase-1 (Hmox1) to chromosome 10 band C1 and heme oxygenase-2 (Hmox2) to chromosome 16 band B1". Cytogenet. Cell Genet. 77 (3–4): 180–1. doi:10.1159/000134570. PMID 9284910.
• Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
• Yoshiki N, Kubota T, Aso T (2000). "Expression and localization of heme oxygenase in human placental villi". Biochem. Biophys. Res. Commun. 276 (3): 1136–42. doi:10.1006/bbrc.2000.3551. PMID 11027601.
• Hanselmann C, Mauch C, Werner S (2001). "Haem oxygenase-1: a novel player in cutaneous wound repair and psoriasis?". Biochem. J. 353 (Pt 3): 459–66. doi:10.1042/0264-6021:3530459. PMC 1221590. PMID 11171041.
• Appleton SD, Marks GS, Nakatsu K, Brien JF, Smith GN, Graham CH, Lash GE (2003). "Effects of hypoxia on heme oxygenase expression in human chorionic villi explants and immortalized trophoblast cells". Am. J. Physiol. Heart Circ. Physiol. 284 (3): H853–8. doi:10.1152/ajpheart.00655.2002 (inactive 2015-01-01). PMID 12578814.
• Galey D, Becker K, Haughey N, Kalehua A, Taub D, Woodward J, Mattson MP, Nath A (2003). "Differential transcriptional regulation by human immunodeficiency virus type 1 and gp120 in human astrocytes". J. Neurovirol. 9 (3): 358–71. doi:10.1080/13550280390201119. PMID 12775419.
• Zenclussen AC, Lim E, Knoeller S, Knackstedt M, Hertwig K, Hagen E, Klapp BF, Arck PC (2004). "Heme oxygenases in pregnancy II: HO-2 is downregulated in human pathologic pregnancies". Am. J. Reprod. Immunol. 50 (1): 66–76. doi:10.1034/j.1600-0897.2003.00047.x. PMID 14506930.
• Boehning D, Moon C, Sharma S, Hurt KJ, Hester LD, Ronnett GV, Shugar D, Snyder SH (2003). "Carbon monoxide neurotransmission activated by CK2 phosphorylation of heme oxygenase-2". Neuron 40 (1): 129–37. doi:10.1016/S0896-6273(03)00596-8. PMID 14527438.
• Appleton SD, Lash GE, Marks GS, Nakatsu K, Brien JF, Smith GN, Graham CH (2004). "Effect of glucose and oxygen deprivation on heme oxygenase expression in human chorionic villi explants and immortalized trophoblast cells". Am. J. Physiol. Regul. Integr. Comp. Physiol. 285 (6): R1453–60. doi:10.1152/ajpregu.00234.2003 (inactive 2015-01-01). PMID 14615405.