UPB1

Ureidopropionase, beta

Identifiers

UPB1 ; BUP1

External IDs

OMIM: 606673 MGI: 2143535 HomoloGene: 9471 GeneCards: UPB1 Gene

3.5.1.6

Gene ontology
Molecular function	• beta-ureidopropionase activity • metal ion binding
Cellular component	• cytosol • extracellular exosome
Biological process	• pyrimidine nucleobase metabolic process • beta-alanine biosynthetic process • small molecule metabolic process • pyrimidine nucleoside catabolic process • nucleobase-containing small molecule metabolic process
Sources: Amigo / QuickGO

RNA expression pattern

More reference expression data

Orthologs

Species

Human

Mouse

RefSeq (mRNA)

RefSeq (protein)

Location (UCSC)

Chr 22:
24.49 – 24.53 Mb

Chr 10:
75.41 – 75.44 Mb

PubMed search

Beta-ureidopropionase is an enzyme that in humans is encoded by the UPB1 gene.^[1]^[2]

This gene encodes a protein that belongs to the CN hydrolase family. Beta-ureidopropionase catalyzes the last step in the pyrimidine degradation pathway. The pyrimidine bases uracil and thymine are degraded via the consecutive action of dihydropyrimidine dehydrogenase (DHPDH), dihydropyrimidinase (DHP) and beta-ureidopropionase (UP) to beta-alanine and beta-aminoisobutyric acid, respectively. UP deficiencies are associated with N-carbamyl-beta-amino aciduria and may lead to abnormalities in neurological activity.^[2]

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles. ^{[§ 1]}

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|{{{bSize}}}px|alt=Fluorouracil (5-FU) Activity edit]]

Fluorouracil (5-FU) Activity edit

↑ The interactive pathway map can be edited at WikiPathways: "FluoropyrimidineActivity_WP1601".

References

↑ Vreken P, van Kuilenburg AB, Hamajima N, Meinsma R, van Lenthe H, Gohlich-Ratmann G, Assmann BE, Wevers RA, van Gennip AH (Dec 1999). "cDNA cloning, genomic structure and chromosomal localization of the human BUP-1 gene encoding beta-ureidopropionase". Biochim Biophys Acta 1447 (2–3): 251–7. doi:10.1016/s0167-4781(99)00182-7. PMID 10542323.
1 2 "Entrez Gene: UPB1 ureidopropionase, beta".

Thomas HR, Ezzeldin HH, Guarcello V, et al. (2008). "Genetic regulation of beta-ureidopropionase and its possible implication in altered uracil catabolism". Pharmacogenet. Genomics 18 (1): 25–35. doi:10.1097/FPC.0b013e3282f2f134. PMID 18216719.
Thomas HR, Ezzeldin HH, Guarcello V, et al. (2008). "Genetic regulation of dihydropyrimidinase and its possible implication in altered uracil catabolism". Pharmacogenet. Genomics 17 (11): 973–87. doi:10.1097/FPC.0b013e3282f01788. PMID 18075467.
van Kuilenburg AB, Meinsma R, Assman B, et al. (2007). "Genetic analysis of the first 4 patients with beta-ureidopropionase deficiency". Nucleosides Nucleotides Nucleic Acids 25 (9–11): 1093–8. doi:10.1080/15257770600956870. PMID 17065070.
Collins JE, Wright CL, Edwards CA, et al. (2005). "A genome annotation-driven approach to cloning the human ORFeome". Genome Biol. 5 (10): R84. doi:10.1186/gb-2004-5-10-r84. PMC 545604. PMID 15461802.
van Kuilenburg AB, Meinsma R, Beke E, et al. (2006). "beta-Ureidopropionase deficiency: an inborn error of pyrimidine degradation associated with neurological abnormalities". Hum. Mol. Genet. 13 (22): 2793–801. doi:10.1093/hmg/ddh303. PMID 15385443.
Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
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.
Sakamoto T, Sakata SF, Matsuda K, et al. (2002). "Expression and properties of human liver beta-ureidopropionase". J. Nutr. Sci. Vitaminol. 47 (2): 132–8. doi:10.3177/jnsv.47.132. PMID 11508704.
Naguib FN, el Kouni MH, Cha S (1985). "Enzymes of uracil catabolism in normal and neoplastic human tissues". Cancer Res. 45 (11 Pt 1): 5405–12. PMID 3931905.

Purine metabolism

Anabolism

R5P→IMP:	Ribose-phosphate diphosphokinase Amidophosphoribosyltransferase Phosphoribosylglycinamide formyltransferase AIR synthetase (FGAM cyclase) Phosphoribosylaminoimidazole carboxylase Phosphoribosylaminoimidazolesuccinocarboxamide synthase IMP synthase

IMP→AMP:	Adenylosuccinate synthase Adenylosuccinate lyase reverse AMP deaminase

IMP→GMP:	IMP dehydrogenase GMP synthase reverse GMP reductase

Nucleotide salvage

Catabolism

Pyrimidine metabolism

Anabolism

CAD Carbamoyl phosphate synthase II Aspartate carbamoyltransferase Dihydroorotase

Dihydroorotate dehydrogenase Orotidine 5'-phosphate decarboxylase/Uridine monophosphate synthetase

CTP synthetase

Catabolism

Deoxyribonucleotides

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UPB1

Interactive pathway map

References

Further reading