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Details on Person Human SL1 does not bind to DNA itself, rather it is recruite...

Class:IdSummation:73746
_displayNameHuman SL1 does not bind to DNA itself, rather it is recruite...
_timestamp2003-11-17 20:06:10
created[InstanceEdit:73851] Comai, L, 2003-07-03 17:13:29
literatureReference[LiteratureReference:75839] Rb and p130 regulate RNA polymerase I transcription: Rb disrupts the interaction between UBF and SL-1.
[LiteratureReference:73744] Repression of RNA polymerase I transcription by the tumor suppressor p53.
[LiteratureReference:75840] Overlapping functions of the pRb family in the regulation of rRNA synthesis.
modified[InstanceEdit:73849] Gillespie, ME, 2003-07-01 00:00:00
[InstanceEdit:75829] Gillespie, ME, 2003-09-02 00:00:00
[InstanceEdit:83531] Gillespie, ME, 2003-11-13 00:00:00
textHuman SL1 does not bind to DNA itself, rather it is recruited to the rDNA promoter through a physical interaction with UBF-1. Phosphorylation of UBF-1 within the carboxy-terminal region is required for SL1 binding. SL1 consists of TATA-binding protein (TBP) and three associated factors (TAFIs). SL1 has no sequence-specific DNA binding activity its recruitment to the promoter being mediated by specific interactions with UBF. Once bound the SL1 complex makes direct contact with the DNA promoter and guides promoter-specific initiation.

Studies to identify the mechanistic relationship between SL1 and UBF-1 have indicated that the interaction between UBF-1 and SL1 is regulated by tumor suppressor proteins such as Rb and P53, although it has also been proposed that Rb prevents UBF-1 from binding to DNA itself.

(summation)[Reaction:73739] Recruitment of acetylated SL1 to p-UBTF:45S pre-rRNA gene [Homo sapiens]
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