Papio anubis      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-Paa-0117
ENSPANG00000015953.2
A0A096NLV1
MDC1
2
LLPS-Paa-0366
ENSPANG00000006362.2
A0A2I3MU53
POU2F1
3
LLPS-Paa-2351
ENSPANG00000018778.3
A0A096NVJ1
SNAPC1
4
LLPS-Paa-0586
ENSPANG00000025882.2
A0A096P0K8
SNAPC2
5
LLPS-Paa-0472
ENSPANG00000025229.2
A0A096P1I1
SNAPC3
6
LLPS-Paa-0636
ENSPANG00000026126.3
A0A096NRS9
SNAPC4
7
LLPS-Paa-1687
ENSPANG00000000569.3
A0A096NGQ1
TBP