Jump to content

SAM-IV riboswitch

From Wikipedia, the free encyclopedia
S-adenosyl methionine (SAM) riboswitch,
Identifiers
SymbolSAM-IV
RfamRF00634 CL00012
Other data
RNA typeCis-reg; riboswitch
Domain(s)Bacteria
SOSO:0005836
PDB structuresPDBe

SAM-IV riboswitches are a kind of riboswitch that specifically binds S-adenosylmethionine (SAM),[1] a cofactor used in many methylation reactions. Originally identified by bioinformatics,[2] SAM-IV riboswitches are largely confined to the Actinomycetales, an order of Bacteria. Conserved features of SAM-IV riboswitch and experiments imply that they probably share a similar SAM-binding site to another class of SAM-binding riboswitches called SAM-I riboswitches. However, the scaffolds of these two types of riboswitch appear to be quite distinct. The structural relationship between these riboswitch types has been studied.[3][4]

See also

[edit]

References

[edit]
  1. ^ Weinberg Z, Regulski EE, Hammond MC, et al. (2008). "The aptamer core of SAM-IV riboswitches mimics the ligand-binding site of SAM-I riboswitches". RNA. 14 (5): 822–828. doi:10.1261/rna.988608. PMC 2327355. PMID 18369181.
  2. ^ Weinberg Z, Barrick JE, Yao Z, et al. (2007). "Identification of 22 candidate structured RNAs in bacteria using the CMfinder comparative genomics pipeline". Nucleic Acids Res. 35 (14): 4809–4819. doi:10.1093/nar/gkm487. PMC 1950547. PMID 17621584.
  3. ^ Trausch JJ, Xu Z, Edwards AL, Reyes FE, Ross PE, Knight R, Batey RT (May 2014). "Structural basis for diversity in the SAM clan of riboswitches". Proc Natl Acad Sci U S A. 111 (18): 6624–9. Bibcode:2014PNAS..111.6624T. doi:10.1073/pnas.1312918111. PMC 4020084. PMID 24753586.
  4. ^ Zhang K, Li S, Kappel K, Pintilie G, Su Z, Mou TC, Schmid MF, Das R, Chiu W (December 2019). "Cryo-EM structure of a 40 kDa SAM-IV riboswitch RNA at 3.7 Å resolution". Nat Commun. 10 (1): 5511. Bibcode:2019NatCo..10.5511Z. doi:10.1038/s41467-019-13494-7. PMC 6890682. PMID 31796736.
[edit]