Rny

• Description: RNase Y, 5' end sensitive endoribonuclease, involved in the degradation/processing of mRNA
  
  

Gene name	rny
Synonyms	ymdA
Essential	yes
Product	RNase Y
Function	Initiates S-box riboswitch RNA turnover, required for the processing of the gapA operon mRNA, depletion of RNase Y increases bulk mRNA stability.
Regulatory function of this protein in SubtiPathways: Central C-metabolism
MW, pI	58,7 kDa, 5.39
Gene length, protein length	1560 bp, 520 amino acids
Immediate neighbours	pbpX, ymdB
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

Categories containing this gene/protein

Rnases, essential genes, membrane proteins

The gene

Basic information

• Locus tag: BSU16960

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:
  • RNase Y cleaves S-box riboswitch RNAs in vivo and in vitro PubMed
  • preference for 5' monophosphorylated substrate in vitro PubMed
  • endonucleolytic cleavage PubMed
  • required for the processing of the gapA operon mRNA PubMed
  • cleavage activity appears sensitive to downstream secondary structure PubMed
  • RNase Y initiates the degradation of rpsO mRNA PubMed

• Protein family: Member of the HD superfamily of metal-dependent phosphohydrolases; 2',3' cyclic nucleotide phosphodiesterase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:
  • transmembrane domain (4–24)
  • KH domain (210–273)
  • HD domain (336–429)

• Modification:

• Cofactor(s): requires Mg+2, which can be replaced by Zn+2 or Mn+2 ions, PubMed

• Effectors of protein activity: appears sensitive to downstream secondary structure, PubMed

• Interactions: part of the RNA degradosome
  • Rny-PfkA PubMed, Rny-Eno PubMed, Rny-PnpA PubMed, Rny-RnjA PubMed, Rny-CshA PubMed

• Localization: cell membrane, single-pass membrane protein PubMed

Database entries

• Structure:

• UniProt: O31774

• KEGG entry: [2]

• E.C. number: 3.1.4.16

Additional information

required for the processing of the gapA operon mRNA

Expression and regulation

• Operon: rny-ymdB

• Sigma factor:

• Regulation: constitutive

• Regulatory mechanism:

• Additional information:
  • there is a terminator between rny and ymdB, most transcripts terminate there
  • The mRNA has a long 5' leader region. This may indicate RNA-based regulation PubMed

Biological materials

• Mutant: essential!!!!, 4043 (rny under p-spac control, cat), GP193 (rny under p-xyl control, cat), both available in Stülke lab; SSB447 (rny under P-spac control, "erm") available in Putzer lab.

• Expression vector:
  • N-terminal Strep-tag, expression in E. coli, in pGP172: pGP441, available in Stülke lab
  • N-terminal Strep-tag, for SPINE, expression in B. subtilis, in pGP380: pGP775 , available in Stülke lab
  • Expression of RNase Y missing the N-terminal transmembrane domain (25aa) as an intein fusion in E. coli (no tag left in the purified protein) available in the Putzer lab
  • wild type rny, expression in B. subtilis, in pBQ200: pGP1201, available in Stülke lab
  • there is also a series of domain constructs present in pBQ200, all available in Stülke lab
  • chromosomal expression of Rny-Strep, spc: GP1033, available in Jörg Stülke's lab

• lacZ fusion: pGP459 (in pAC7), available in Stülke lab

• GFP fusion: B. subtilis 3569 (amyE:: (p-xyl rny-gfpmut1-spc)), available in Errington lab, pGP1368 for chromosomal expression of rny-YFP, available in Stülke lab

• two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab

• FLAG-tag construct: GP1030 (spc, based on pGP1331), available in the Stülke lab

• Antibody: available in van Dijl and Stülke labs

Labs working on this gene/protein

Harald Putzer, IBPC Paris, France Homepage

Jörg Stülke, University of Göttingen, Germany Homepage