Saccharomyces_cerevisiaeFamily: Ribonuc_L-PSP Number of Genes: 3
Ensembl IDSymbolEntrez IDRBD RBPome PRIExpresion PathwayPhenotype ParalogOrthologGO



Endoribonuclease active on single-stranded mRNA. Inhibits protein synthesis by cleavage of mRNA [1]. Previously thought to inhibit protein synthesis initiation [2]. This protein may also be involved in the regulation of purine biosynthesis [3]. YjgF (renamed RidA) family members are enamine/imine deaminases. They hydrolyze reactive intermediates released by PLP-dependent enzymes, including threonine dehydratase [5]. YjgF also prevents inhibition of transaminase B (IlvE) in Salmonella [4].


The YjgF/YER057c/UK114 family (also known as the Rid family) of proteins is conserved in all domains of life [PUBMED:22094463]. A phylogenetic analysis applied by Lambrecht et al. has divided the Rid family into a widely distributed archetypal RidA (YjgF) subfamily and seven other subfamilies (Rid1 to Rid7) that are largely confined to bacteria and often co-occur in the same organism with RidA and each other [PUBMED:25975565]. Although the family members share high levels of protein sequence and structue similarity, their functions vary widely across different species [PUBMED:4632080].


  1. Morishita R, Kawagoshi A, Sawasaki T, Madin K, Ogasawara T, Oka T, Endo Y; , J Biol Chem 1999;274:20688-20692.: Ribonuclease activity of rat liver perchloric acid-soluble protein, a potent inhibitor of protein synthesis. PUBMED:10400702 EPMC:10400702 .

  2. Oka T, Tsuji H, Noda C, Sakai K, Hong YM, Suzuki I, Munoz S, Natori Y; , J Biol Chem 1995;270:30060-30067.: Isolation and characterization of a novel perchloric acid-soluble protein inhibiting cell-free protein synthesis. PUBMED:8530410 EPMC:8530410 .

  3. Rappu P, Shin BS, Zalkin H, Mantsala P; , J Bacteriol 1999;181:3810-3815.: A role for a highly conserved protein of unknown function in regulation of Bacillus subtilis purA by the purine repressor. PUBMED:10368157 EPMC:10368157 .

  4. Schmitz G, Downs DM;, J Bacteriol. 2004;186:803-810.: Reduced transaminase B (IlvE) activity caused by the lack of yjgF is dependent on the status of threonine deaminase (IlvA) in Salmonella enterica serovar Typhimurium. PUBMED:14729707 EPMC:14729707 .

  5. Lambrecht JA, Flynn JM, Downs DM;, J Biol Chem. 2012;287:3454-3461.: Conserved YjgF Protein Family Deaminates Reactive Enamine/Imine Intermediates of Pyridoxal 5'-Phosphate (PLP)-dependent Enzyme Reactions. PUBMED:22094463 EPMC:22094463 .

  6. Thakur KG, Praveena T, Gopal B;, Proteins. 2010;78:773-778.: Mycobacterium tuberculosis Rv2704 is a member of the YjgF/YER057c/UK114 family. PUBMED:19899170 EPMC:19899170.