Macaca mulatta      OPT domain


※ OPT domain introduction

    In some cells, PTF is concentrated in one, or very few, discrete regions (diameter approximately 1.3 micron) that appear during G1 phase and disappear in S phase. Oct1, a transcription factor that interacts with PTF, is also enriched in these domains, RNA polymerase II, TBP and Sp1 are also present. Each domain typically contains 2 or 3 transcription 'factories' where Br-UTP is incorporated into nascent transcripts. This region was named Oct1/PTF/transcription (OPT) domain. The domains may act like nucleoli to bring particular genes on specific chromosomes together to a region where the appropriate transcription and processing factors are concentrated, thereby facilitating the expression of those genes (1). In fact, incomplete DNA synthesis during S phase leads to a DNA damage response and formation of 53BP1-OPT domains in the subsequent G1, which indicates that replication stress induces 53BP1-containing OPT domains in G1 cells (2).

Reference
1. Pombo, A., Cuello, P., Schul, W., Yoon, J. B., Roeder, R. G., Cook, P. R., & Murphy, S. (1998) Regional and temporal specialization in the nucleus: a transcriptionally-active nuclear domain rich in PTF, Oct1 and PIKA antigens associates with specific chromosomes early in the cell cycle. EMBO J, 17(6), 1768-1778. PMID: 9501098
2. Harrigan, J. A., Belotserkovskaya, R., Coates, J., Dimitrova, D. S., Polo, S. E., Bradshaw, C. R., et al. (2011) Replication stress induces 53BP1-containing OPT domains in G1 cells. J Cell Biol, 193(1), 97-108. PMID: 21444690


There are 7 genes.  Reviewed (0 or Unreviewed (7

No.StatusDrLLPS IDEnsemble Gene IDUniProt AccessionGene Name
1
LLPS-Mam-1159
ENSMMUG00000023685.3
F7HCZ1
MDC1
2
LLPS-Mam-3356
ENSMMUG00000008155.3
A0A1D5R2U1
POU2F1
3
LLPS-Mam-0254
ENSMMUG00000017303.3
F7HSC7
SNAPC1
4
LLPS-Mam-0506
ENSMMUG00000006540.3
F7HTV2
SNAPC2
5
LLPS-Mam-3408
ENSMMUG00000016189.3
F7FQ67
SNAPC3
6
LLPS-Mam-4176
ENSMMUG00000003086.3
A0A1D5QBV1
SNAPC4
7
LLPS-Mam-3064
ENSMMUG00000019917.3
F6SEF6
TBP