Abstract

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Analysis of the molecular identity of the pH sensor in the prokaryotic potassium channel KcsA identified several key mutants that stabilized the KcsA inner bundle gate in the fully open conformation at neutral pH, a fact that makes possible the crystallographic analyses of KcsA in a variety of functional states. As a first approach, we planned to determine the crystal structure of open KcsA via analysis of several of these constitutively open KcsA mutants. Additional mutations in the selectivity filter were designed towards the determination of a fully conductive and an inactivated form of the channel. A preliminary crystal structure of one of these mutants in complex with a Fab has provided tantalizing new information regarding the mechanism of gate opening in KcsA and a likely path towards the fully open state.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR015301-08
Application #
8169261
Study Section
Special Emphasis Panel (ZRG1-BCMB-K (40))
Project Start
2010-04-01
Project End
2011-03-31
Budget Start
2010-04-01
Budget End
2011-03-31
Support Year
8
Fiscal Year
2010
Total Cost
$24,415
Indirect Cost

  Institution

Name
Cornell University
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
872612445
City
Ithaca
State
NY
Country
United States
Zip Code
14850

  Publications

Chen, Wenyang; Mandali, Sridhar; Hancock, Stephen P et al. (2018) Multiple serine transposase dimers assemble the transposon-end synaptic complex during IS607-family transposition. Elife 7:
Eichhorn, Catherine D; Yang, Yuan; Repeta, Lucas et al. (2018) Structural basis for recognition of human 7SK long noncoding RNA by the La-related protein Larp7. Proc Natl Acad Sci U S A 115:E6457-E6466
Fallas, Jorge A; Ueda, George; Sheffler, William et al. (2017) Computational design of self-assembling cyclic protein homo-oligomers. Nat Chem 9:353-360
Krotee, Pascal; Rodriguez, Jose A; Sawaya, Michael R et al. (2017) Atomic structures of fibrillar segments of hIAPP suggest tightly mated ?-sheets are important for cytotoxicity. Elife 6:
Dhayalan, Balamurugan; Mandal, Kalyaneswar; Rege, Nischay et al. (2017) Scope and Limitations of Fmoc Chemistry SPPS-Based Approaches to the Total Synthesis of Insulin Lispro via Ester Insulin. Chemistry 23:1709-1716
Bale, Jacob B; Gonen, Shane; Liu, Yuxi et al. (2016) Accurate design of megadalton-scale two-component icosahedral protein complexes. Science 353:389-94
AhYoung, Andrew P; Koehl, Antoine; Vizcarra, Christina L et al. (2016) Structure of a putative ClpS N-end rule adaptor protein from the malaria pathogen Plasmodium falciparum. Protein Sci 25:689-701
Hancock, Stephen P; Stella, Stefano; Cascio, Duilio et al. (2016) DNA Sequence Determinants Controlling Affinity, Stability and Shape of DNA Complexes Bound by the Nucleoid Protein Fis. PLoS One 11:e0150189
Kattke, Michele D; Chan, Albert H; Duong, Andrew et al. (2016) Crystal Structure of the Streptomyces coelicolor Sortase E1 Transpeptidase Provides Insight into the Binding Mode of the Novel Class E Sorting Signal. PLoS One 11:e0167763
Jorda, J; Leibly, D J; Thompson, M C et al. (2016) Structure of a novel 13 nm dodecahedral nanocage assembled from a redesigned bacterial microcompartment shell protein. Chem Commun (Camb) 52:5041-4

Showing the most recent 10 out of 407 publications