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TitleChromatin localization of nucleophosmin organizes ribosome biogenesis.
Journal, issue, pagesMol Cell, Vol. 82, Issue 23, Page 4443-44457.e9, Year 2022
Publish dateDec 1, 2022
AuthorsIlaria Ugolini / Silvija Bilokapic / Mylene Ferrolino / Josiah Teague / Yinxia Yan / Xuelin Zhou / Ashish Deshmukh / Michael White / Richard W Kriwacki / Mario Halic /
PubMed AbstractRibosome biogenesis takes place in the nucleolus, a nuclear membrane-less organelle. Although well studied, it remains unknown how nascent ribosomal subunits separate from the central chromatin ...Ribosome biogenesis takes place in the nucleolus, a nuclear membrane-less organelle. Although well studied, it remains unknown how nascent ribosomal subunits separate from the central chromatin compartment and move to the outer granular component, where maturation occurs. We find that the Schizosaccharomyces pombe nucleophosmin-like protein Fkbp39 localizes to rDNA sites encoding the 60S subunit rRNA, and this localization contributes to its specific association with nascent 60S subunits. Fkbp39 dissociates from chromatin to bind nascent 60S subunits, causing the latter to partition away from chromatin and from nascent 40S subunits through liquid-liquid phase separation. In vivo, Fkbp39 binding directs the translocation of nascent 60S subunits toward the nucleophosmin-rich granular component. This process increases the efficiency of 60S subunit assembly, facilitating the incorporation of 60S RNA domain III. Thus, chromatin localization determines the specificity of nucleophosmin in sorting nascent ribosomal subunits and coordinates their movement into specialized assembly compartments within the nucleolus.
External linksMol Cell / PubMed:36423630 / PubMed Central
MethodsEM (single particle)
Resolution2.8 - 3.8 Å
Structure data

EMDB-24395: Fkbp39 interacting nascent 60S subunit 1
PDB-8eti: Fkbp39 associated 60S nascent ribosome State 1
Method: EM (single particle) / Resolution: 3.7 Å

EMDB-24396: Fkbp39 associated nascent 60S class 2
PDB-8etj: Fkbp39 associated 60S nascent ribosome State 2
Method: EM (single particle) / Resolution: 3.2 Å

EMDB-24397: Fkbp39 associated nascent 60S class 3
PDB-8etg: Fkbp39 associated 60S nascent ribosome State 3
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-24398: Fkbp39 associated nascent 60S class 4
PDB-8etc: Fkbp39 associated nascent 60S ribosome State 4
Method: EM (single particle) / Resolution: 3.1 Å

EMDB-24409: Ytm1 associated nascent 60S class 1B
PDB-8eth: Ytm1 associated 60S nascent ribosome State 1B
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-24410: Ytm1 associated nascent 60S class 1A
PDB-8eup: Ytm1 associated 60S nascent ribosome State 1A
Method: EM (single particle) / Resolution: 3.1 Å

EMDB-24411: Ytm1 associated nascent 60S class 2
PDB-8esq: Ytm1 associated nascent 60S ribosome State 2
Method: EM (single particle) / Resolution: 2.8 Å

EMDB-24412: Ytm1 associated nascent 60S class 3
PDB-8eug: Ytm1 associated nascent 60S ribosome State 3
Method: EM (single particle) / Resolution: 2.8 Å

EMDB-24420: Ytm1 associated nascent 60S in fkbp39 deletion cells class 1A
PDB-8euy: Ytm1 associated nascent 60S ribosome (-fkbp39) State 1A
Method: EM (single particle) / Resolution: 3.0 Å

EMDB-24421: Ytm1 associated nascent 60S in fkbp39 deletion cells class 1B
PDB-8ev3: Ytm1 associated 60S nascent ribosome (-Fkbp39) State 1B
Method: EM (single particle) / Resolution: 3.0 Å

EMDB-24422: Ytm1 associated nascent 60S in fkbp39 deletion cells class 2
PDB-8esr: Ytm1 associated nascent 60S ribosome (-fkbp39) State 2
Method: EM (single particle) / Resolution: 3.2 Å

EMDB-24423: Ytm1 associated nascent 60S in fkbp39 deletion cells class 3
PDB-8eui: Ytm1 associated nascent 60S ribosome (-fkbp39) State 3
Method: EM (single particle) / Resolution: 3.1 Å

Chemicals

ChemComp-ZN:
Unknown entry

Source
  • schizosaccharomyces pombe (fission yeast)
KeywordsRIBOSOME / Nucleophosmin / ribosome biogenesis / fkbp / 60S ribosome

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