The AFF4 scaffold binds human P-TEFb adjacent to HIV Tat.
Schulze-Gahmen, U., Upton, H., Birnberg, A., Bao, K., Chou, S., Krogan, N.J., Zhou, Q., Alber, T.(2013) Elife 2: e00327-e00327
- PubMed: 23471103 
- DOI: 10.7554/eLife.00327
- Primary Citation of Related Structures:  
4IMY - PubMed Abstract: 
Human positive transcription elongation factor b (P-TEFb) phosphorylates RNA polymerase II and regulatory proteins to trigger elongation of many gene transcripts. The HIV-1 Tat protein selectively recruits P-TEFb as part of a super elongation complex (SEC) organized on a flexible AFF1 or AFF4 scaffold ...