HHMI UCB LBL

Molecular Degradation

Proteasome-mediated proteolysis

Eukaryotic cells contains thousands of different proteins, many of which are required for only brief periods during the cellular cycle. These short-lived proteins, along with any misfolded or damaged intracellular proteins, are destroyed by a large proteolytic complex named the 26S proteasome.... read more

Proteasome

CRISPR-mediated prokaryotic immunity

In E. coli, CRISPR transcripts are processed into short RNAs that are incorporated into a large ribonucleoprotein surveillance complex called Cascade. This complex specifically targets and binds foreign nucleic acids in a sequence-specific manner, followed by degradation of the targeted substrate. We used cryo-electron microscopy to determine the structure of Cascade before and after binding to a target substrate... read more

CRISPER

Exosome and RNA Processing

The eukaryotic exosome is a conserved complex important for 3' end trimming and degradation of RNA. In yeast, the Rrp44 protein constitutively associates with the nine-subunit core exosome and provides the sole sources of processive 3'-to-5' exoribonuclease activity. We have obtained EM reconstructions of the core and Rrp44-bound exosome complexes... read more

eIF3

News

Recent publications

Baskaran et al. <a href=http://elifesciences.org/content/early/2014/12/09/eLife.05115> Architecture and dynamics of the autophagic phosphatidylinositol 3-kinase complex</a><i>eLife</i>, 2014;10.7554 Epub Raymond Staals, Yifan Zhu, David Taylor et al. <a href=http://www.sciencedirect.com/science/article/pii/S1097276514007898> RNA Targeting by the Type III-A CRISPR-Cas Csm Complex of Thermus thermophilus.</a> <i>Mol Cell</i> <b>56</b>, 518-539 Greg Alushin et al. <a href=http://www.ncbi.nlm.nih.gov/pubmed/24855948> High-Resolution Microtubule Structures Reveal the Structural Transitions in αβ-Tubulin upon GTP Hydrolysis</a><i>Cell</i>, 157(5)1117-29. Megan Hochstrasser, David Taylor et al. <a href=http://www.ncbi.nlm.nih.gov/pubmed/24748111> CasA mediates Cas3-catalyzed target degradation during CRISPR RNA-guided interference.</a><i>Proc Natl Acad Sci</i>, <b>111(18)</b>, 6618-23. Martin Jinek et al. <a href=http://www.sciencemag.org/content/early/2014/02/05/science.1247997> Structures of Cas9 Endonucleases Reveal RNA-Mediated Conformational Activation</a><i>Science</i>, <b>343(6176)</b>, 1247997

Protein Society Logo

Eva Nogales was announced as the receipient of the 2015 Dorothy Crowfoot Hodgkin Award.
This award is sponsored by Genentech, and granted in recognition of exceptional contributions in protein science which profoundly influence our understanding of biology.

Thesis award

David Taylor and Vignesh Kasinath have repectivley received the Damon Runyon and Helen Hay Whitney Postdoctoral Fellowships.
David Taylor received the Mary Ellen Jones Dissertation Prize, which is awarded annually to recognize the most distinguished dissertation in Molecular Biophysics and Biochemistry at Yale University.