NOP53 cDNA ORF clone, Saccharomyces cerevisiae S288C

The nucleotide sequence of Saccharomyces cerevisiae chromosome XVI.
Bussey H, Storms RK, Ahmed A, Albermann K, Allen E, Ansorge W, Araujo R, Aparicio A, Barrell B, Badcock K, Benes V, Botstein D, Bowman S, Br?ckner M, Carpenter J, Cherry JM, Chung E, Churcher C, Coster F, Davis K, Davis RW, Dietrich FS, Delius H, DiPaolo T, Hani J
Nature387(6632 Suppl)103-5(1997 May)

Life with 6000 genes.
Goffeau A, Barrell BG, Bussey H, Davis RW, Dujon B, Feldmann H, Galibert F, Hoheisel JD, Jacq C, Johnston M, Louis EJ, Mewes HW, Murakami Y, Philippsen P, Tettelin H, Oliver SG
Science (New York, N.Y.)274(5287)546, 563-7(1996 Oct)

report the 3.2 A resolution crystal structure of S. cerevisiae Mtr4 bound to the interacting region of Nop53, revealing how the KOW domain of the helicase recognizes the AIM sequence of Nop53 with a network of hydrophobic and electrostatic interactions
Title: Structural insights into the interaction of the nuclear exosome helicase Mtr4 with the preribosomal protein Nop53.

Study reports the identification of adaptor proteins that recruit the exosome-associated helicase, Mtr4, to unique RNA substrates. Nop53, the yeast homolog of the tumor suppressor PICT1, targets Mtr4 to pre-ribosomal particles for exosome-mediated processing, while a second adaptor Utp18 recruits Mtr4 to cleaved rRNA fragments destined for degradation by the exosome.
Title: The Exosome Is Recruited to RNA Substrates through Specific Adaptor Proteins.

protein A-tagged Nop53p coprecipitated the 27S and 7S pre-rRNAs, and His-Nop53p also bound directly 5.8S rRNA in vitro, which is consistent with a role for Nop53p in pre-rRNA processing
Title: Nop53p, an essential nucleolar protein that interacts with Nop17p and Nip7p, is required for pre-rRNA processing in Saccharomyces cerevisiae.

Nop53p is a late-acting factor in the nuclear maturation of 60S ribosomal subunits, which is required for normal acquisition of export competence.
Title: Nop53p is required for late 60S ribosome subunit maturation and nuclear export in yeast.

Deletion or mutations within NOP53 cause significant growth defects and display significant 60 S subunit deficiencies, an imbalance in the 40 S:60 S ratio, and defects in progression beyond the 27 S stage of 25 S rRNA maturation during 60 S biogenesis.
Title: Nop53p is a novel nucleolar 60S ribosomal subunit biogenesis protein.