PXMP3

Peroxisomal biogenesis factor 2
Identifiers
Symbols	PEX2 ; PAF1; PBD5A; PBD5B; PMP3; PMP35; PXMP3; RNF72; ZWS3
External IDs	OMIM: 170993 MGI: 107486 HomoloGene: 269 GeneCards: PEX2 Gene
Gene ontology Molecular function • ubiquitin-protein transferase activity • protein binding • zinc ion binding Cellular component • peroxisomal membrane • integral component of peroxisomal membrane • membrane • Cdc73/Paf1 complex Biological process • very long-chain fatty acid metabolic process • negative regulation of transcription from RNA polymerase II promoter • protein polyubiquitination • neuron migration • fatty acid beta-oxidation • bile acid biosynthetic process • peroxisome organization • protein import into peroxisome matrix • protein destabilization • cholesterol homeostasis • regulation of cholesterol biosynthetic process • negative regulation of fibroblast proliferation • negative regulation of epithelial cell proliferation Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	5828	19302
Ensembl	ENSG00000164751	ENSMUSG00000040374
UniProt	P28328	P55098
RefSeq (mRNA)	NM_000318	NM_001163301
RefSeq (protein)	NP_000309	NP_001156773
Location (UCSC)	Chr 8: 76.98 – 77 Mb	Chr 3: 5.56 – 5.58 Mb
PubMed search

Peroxisome assembly factor 1 is a protein that in humans is encoded by the PXMP3 gene.^[1][2]

This gene encodes an integral peroxisomal membrane protein required for peroxisome biogenesis. The protein is thought to be involved in peroxisomal matrix protein import. Mutations in this gene result in one form of Zellweger syndrome and infantile Refsum disease. Alternative splicing results in multiple transcript variants encoding the same protein.^[2]

References

1. Shimozawa N, Tsukamoto T, Suzuki Y, Orii T, Shirayoshi Y, Mori T, Fujiki Y (Apr 1992). "A human gene responsible for Zellweger syndrome that affects peroxisome assembly". Science 255 (5048): 1132–4. doi:10.1126/science.1546315. PMID 1546315.
2. "Entrez Gene: PXMP3 peroxisomal membrane protein 3, 35kDa (Zellweger syndrome)".

Further reading

• Distel B, Erdmann R, Gould SJ, et al. (1996). "A unified nomenclature for peroxisome biogenesis factors.". J. Cell Biol. 135 (1): 1–3. doi:10.1083/jcb.135.1.1. PMC 2121017. PMID 8858157.
• Patarca R, Fletcher MA (1992). "Ring finger in the peroxisome assembly factor-1.". FEBS Lett. 312 (1): 1–2. doi:10.1016/0014-5793(92)81397-5. PMID 1426230.
• Tsukamoto T, Miura S, Fujiki Y (1991). "Restoration by a 35K membrane protein of peroxisome assembly in a peroxisome-deficient mammalian cell mutant.". Nature 350 (6313): 77–81. doi:10.1038/350077a0. PMID 1750930.
• Brul S, Westerveld A, Strijland A, et al. (1988). "Genetic heterogeneity in the cerebrohepatorenal (Zellweger) syndrome and other inherited disorders with a generalized impairment of peroxisomal functions. A study using complementation analysis.". J. Clin. Invest. 81 (6): 1710–5. doi:10.1172/JCI113510. PMC 442615. PMID 2454948.
• Berteaux-Lecellier V, Picard M, Thompson-Coffe C, et al. (1995). "A nonmammalian homolog of the PAF1 gene (Zellweger syndrome) discovered as a gene involved in caryogamy in the fungus Podospora anserina.". Cell 81 (7): 1043–51. doi:10.1016/S0092-8674(05)80009-1. PMID 7600573.
• Masuno M, Shimozawa N, Suzuki Y, et al. (1994). "Assignment of the human peroxisome assembly factor-1 gene (PXMP3) responsible for Zellweger syndrome to chromosome 8q21.1 by fluorescence in situ hybridization.". Genomics 20 (1): 141–2. doi:10.1006/geno.1994.1144. PMID 8020947.
• Shimozawa N, Suzuki Y, Tomatsu S, et al. (1999). "A novel mutation, R125X in peroxisome assembly factor-1 responsible for Zellweger syndrome.". Hum. Mutat. Suppl 1: S134–6. doi:10.1002/humu.1380110145. PMID 9452066.
• Gärtner J, Brosius U, Obie C, et al. (1998). "Restoration of PEX2 peroxisome assembly defects by overexpression of PMP70.". Eur. J. Cell Biol. 76 (4): 237–45. doi:10.1016/s0171-9335(98)80001-0. PMID 9765053.
• Shimozawa N, Imamura A, Zhang Z, et al. (1999). "Defective PEX gene products correlate with the protein import, biochemical abnormalities, and phenotypic heterogeneity in peroxisome biogenesis disorders.". J. Med. Genet. 36 (10): 779–81. doi:10.1136/jmg.36.10.779. PMC 1734244. PMID 10528859.
• Okumoto K, Abe I, Fujiki Y (2000). "Molecular anatomy of the peroxin Pex12p: ring finger domain is essential for Pex12p function and interacts with the peroxisome-targeting signal type 1-receptor Pex5p and a ring peroxin, Pex10p.". J. Biol. Chem. 275 (33): 25700–10. doi:10.1074/jbc.M003303200. PMID 10837480.
• Biermanns M, Gärtner J (2000). "Genomic organization and characterization of human PEX2 encoding a 35-kDa peroxisomal membrane protein.". Biochem. Biophys. Res. Commun. 273 (3): 985–90. doi:10.1006/bbrc.2000.3039. PMID 10891359.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Biermanns M, von Laar J, Brosius U, Gärtner J (2003). "The peroxisomal membrane targeting elements of human peroxin 2 (PEX2).". Eur. J. Cell Biol. 82 (4): 155–62. doi:10.1078/0171-9335-00310. PMID 12751901.
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
• Steinberg S, Chen L, Wei L, et al. (2005). "The PEX Gene Screen: molecular diagnosis of peroxisome biogenesis disorders in the Zellweger syndrome spectrum.". Mol. Genet. Metab. 83 (3): 252–63. doi:10.1016/j.ymgme.2004.08.008. PMID 15542397.
• Stelzl U, Worm U, Lalowski M, et al. (2005). "A human protein-protein interaction network: a resource for annotating the proteome.". Cell 122 (6): 957–68. doi:10.1016/j.cell.2005.08.029. PMID 16169070.
• Rual JF, Venkatesan K, Hao T, et al. (2005). "Towards a proteome-scale map of the human protein-protein interaction network.". Nature 437 (7062): 1173–8. doi:10.1038/nature04209. PMID 16189514.
• Kimura K, Wakamatsu A, Suzuki Y, et al. (2006). "Diversification of transcriptional modulation: large-scale identification and characterization of putative alternative promoters of human genes.". Genome Res. 16 (1): 55–65. doi:10.1101/gr.4039406. PMC 1356129. PMID 16344560.

External links

• GeneReviews/NCBI/NIH/UW entry on Peroxisome Biogenesis Disorders, Zellweger Syndrome Spectrum
• OMIM entries on Peroxisome Biogenesis Disorders, Zellweger Syndrome Spectrum