SGD DescriptionAP4A phosphorylase; bifunctional diadenosine 5',5'''-P1,P4-tetraphosphate phosphorylase and ADP sulfurylase involved in catabolism of bis(5'-nucleosidyl) tetraphosphates; catalyzes phosphorolysis of dinucleoside oligophosphates, cleaving substrates' alpha/beta-anhydride bond and introducing Pi into the beta-position of the corresponding NDP formed; protein abundance increases under DNA replication stress; APA1 has a paralog, APA2, that arose from the whole genome duplication|Diadenosine 5',5'''-P1,P4-tetraphosphate phosphorylase II; AP4A phosphorylase involved in catabolism of bis(5'-nucleosidyl) tetraphosphates; APA2 has a paralog, APA1, that arose from the whole genome duplication
AspGD DescriptionOrtholog(s) have bis(5'-nucleosyl)-tetraphosphatase activity, sulfate adenylyltransferase (ADP) activity, role in nucleoside catabolic process, nucleotide biosynthetic process and cytoplasm, nucleus localization
References
Guranowski A, et al. (1985 Mar 25). Phosphorolytic cleavage of diadenosine 5',5'''-P1,P4-tetraphosphate. Properties of homogeneous diadenosine 5',5'''-P1,P4-tetraphosphate alpha, beta-phosphorylase from Saccharomyces cerevisiae.
Guranowski A, et al. (1986 May 5). Diadenosine 5',5'''-P1, P4-tetraphosphate alpha, beta-phosphorylase from yeast supports nucleoside diphosphate-phosphate exchange.
Guranowski A, et al. (1988 Apr 19). Synthesis of diadenosine 5',5'''-P1,P4-tetraphosphate (AppppA) from adenosine 5'-phosphosulfate and adenosine 5'-triphosphate catalyzed by yeast AppppA phosphorylase.
Plateau P, et al. (1989 Dec). Isolation, characterization, and inactivation of the APA1 gene encoding yeast diadenosine 5',5'''-P1,P4-tetraphosphate phosphorylase.
Plateau P, et al. (1990 Dec). Catabolism of bis(5'-nucleosidyl) tetraphosphates in Saccharomyces cerevisiae.
Kaushal V, et al. (1990 Oct 30). Sequencing and enhanced expression of the gene encoding diadenosine 5',5'''-P1, P4-tetraphosphate (Ap4A) phosphorylase in Saccharomyces cerevisiae.
Avila DM, et al. (1991 Dec). A paradoxical increase of a metabolite upon increased expression of its catabolic enzyme: the case of diadenosine tetraphosphate (Ap4A) and Ap4A phosphorylase I in Saccharomyces cerevisiae.
Mulder W, et al. (1994 Nov 22). Isolation and characterisation of the linked genes APA2 and QCR7, coding for Ap4A phosphorylase II and the 14 kDa subunit VII of the mitochondrial bc1-complex in the yeast Kluyveromyces lactis.
Booth JW, et al. (1995 Aug 18). An alleged yeast polyphosphate kinase is actually diadenosine-5', 5"'-P1,P4-tetraphosphate alpha,beta-phosphorylase.
Hou WT, et al. (2013 Aug 9). Structures of yeast Apa2 reveal catalytic insights into a canonical AP₄A phosphorylase of the histidine triad superfamily.