Pongo abelii      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-Poa-4281
ENSPPYG00000016418.2
H2PIG1
MDC1
2
LLPS-Poa-1614
ENSPPYG00000000552.2
H2N4V6
POU2F1
3
LLPS-Poa-0733
ENSPPYG00000005882.2
H2NLG5
SNAPC1
4
LLPS-Poa-0898
ENSPPYG00000009494.2
H2NXD0
SNAPC2
5
LLPS-Poa-2683
ENSPPYG00000019207.2
H2PS47
SNAPC3
6
LLPS-Poa-2735
ENSPPYG00000019771.1
H2PTY6
SNAPC4
7
LLPS-Poa-3612
ENSPPYG00000017192.2
H2PKX9
TBP