RRNK mala podjedinica pseudouridinske metiltransferaze Nep1

rRNK mala podjedinica pseudouridinske metiltransferaze Nep1
Identifikatori
EC broj2.1.1.260
Baze podataka
IntEnzIntEnz pregled
BRENDABRENDA pristup
ExPASyNiceZyme pregled
KEGGKEGG pristup
MetaCycmetabolički put
PRIAMprofil
Strukture PBPRCSB PDB PDBe PDBj PDBsum

rRNK mala podjedinica pseudouridinske metiltransferaze Nep1 (EC 2.1.1.260, Nep1, nukleolarni esencijalni protein 1) je enzim sa sistematskim imenom S-adenozil-L-metionin:18S rRNK (pseudouridin1191-N1)-metiltransferaza.[1][2][3] Ovaj enzim katalizuje sledeću hemijsku reakciju

S-adenozil-L-metionin + pseudouridin1191 u kvašćanoj 18S rRNK S-adenozil-L-homocistein + N1-metilpseudouridin1191 u kvašćanoj 18S rRNK

Ovaj enzim se javlja kod prokariota i eukariota. On specifično prepoznaje pseudouridinske ostatke (Psi) u malim podjedinicama ribozomalne RNK na bazi lokalne RNK strukture.

Reference

  1. ^ Taylor, A.B., Meyer, B., Leal, B.Z., Kötter, P., Schirf, V., Demeler, B., Hart, P.J., Entian, K.-D. and Wöhnert, J. (2008). „The crystal structure of Nep1 reveals an extended SPOUT-class methyltransferase fold and a pre-organized SAM-binding site”. Nucleic Acids Res. 36: 1542—1554. PMID 18208838. 
  2. ^ Wurm, J.P., Meyer, B., Bahr, U., Held, M., Frolow, O., Kötter, P., Engels, J.W., Heckel, A., Karas, M., Entian, K.-D. and Wöhnert, J. (2010). „The ribosome assembly factor Nep1 responsible for Bowen-Conradi syndrome is a pseudouridine-N1-specific methyltransferase”. Nucleic Acids Res. 38: 2387—2398. PMID 20047967. 
  3. ^ Meyer, B., Wurm, J.P., Kötter, P., Leisegang, M.S., Schilling, V., Buchhaupt, M., Held, M., Bahr, U., Karas, M., Heckel, A., Bohnsack, M.T., Wöhnert, J. and Entian, K.-D. (2011). „The Bowen-Conradi syndrome protein Nep1 (Emg1) has a dual role in eukaryotic ribosome biogenesis, as an essential assembly factor and in the methylation of Ψ1191 in yeast 18S rRNA”. Nucleic Acids Res. 39: 1526—1537. PMID 20972225. 

Literatura

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