Answers and Questions from the KvAP Structures

The recent landmark structures of KvAP, a voltage-gated potassium (Kv) channel, provide the first high-resolution experimental structural models of this class of proteins. Previous extensive studies of Kv channels provide a means to evaluate and interpret the KvAP structures. In this minireview, we survey different experimental approaches to Kv channels and map these findings to KvAP, showing that the relationship between the KvAP structures and other Kv channels is uncertain.

[1]  Richard W. Aldrich,et al.  Uncharged S4 Residues and Cooperativity in Voltage-dependent Potassium Channel Activation , 1998, The Journal of general physiology.

[2]  Francisco Bezanilla,et al.  Histidine Scanning Mutagenesis of Basic Residues of the S4 Segment of the Shaker K+ Channel , 2001, The Journal of general physiology.

[3]  G M Whitesides,et al.  Rates of thiol-disulfide interchange reactions involving proteins and kinetic measurements of thiol pKa values. , 1980, Biochemistry.

[4]  F. Ashcroft,et al.  Crystal Structure of the Potassium Channel KirBac1.1 in the Closed State , 2003, Science.

[5]  G. A. Lopez,et al.  Hydrophobic substitution mutations in the S4 sequence alter voltage-dependent gating in shaker K+ channels , 1991, Neuron.

[6]  Benoît Roux,et al.  Structural basis of two-stage voltage-dependent activation in K+ channels , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[7]  P. Århem,et al.  Localization of the extracellular end of the voltage sensor S4 in a potassium channel. , 2001, Biophysical journal.

[8]  B. Chait,et al.  The structure of the potassium channel: molecular basis of K+ conduction and selectivity. , 1998, Science.

[9]  C. Partridge,et al.  Depolarization Induces Intersubunit Cross-linking in a S4 Cysteine Mutant of the Shaker Potassium Channel* , 2002, The Journal of Biological Chemistry.

[10]  Benoit Roux,et al.  In Brief , 2003, Nature Reviews Neuroscience.

[11]  D. Wilkin,et al.  Neuron , 2001, Brain Research.

[12]  Ehud Y. Isacoff,et al.  Transmembrane Movement of the Shaker K+ Channel S4 , 1996, Neuron.

[13]  F. Young Biochemistry , 1955, The Indian Medical Gazette.

[14]  Youxing Jiang,et al.  The open pore conformation of potassium channels , 2002, Nature.

[15]  W. Lim,et al.  Deciphering the message in protein sequences: tolerance to amino acid substitutions. , 1990, Science.

[16]  H. Guy,et al.  Structural models of the transmembrane region of voltage-gated and other K+ channels in open, closed, and inactivated conformations. , 1998, Journal of structural biology.

[17]  Alan L. Goldin,et al.  Topology of the Shaker Potassium Channel Probed with Hydrophilic Epitope Insertions , 1997, The Journal of cell biology.

[18]  D. Engelman,et al.  Specificity in transmembrane helix–helix interactions can define a hierarchy of stability for sequence variants , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[19]  A. Kossiakoff,et al.  The crystallographically determined structures of atypical strained disulfides engineered into subtilisin. , 1986, The Journal of biological chemistry.

[20]  D. Hackos,et al.  α-Helical Structural Elements within the Voltage-Sensing Domains of a K+ Channel , 2000, The Journal of general physiology.

[21]  Youxing Jiang,et al.  Functional analysis of an archaebacterial voltage-dependent K+ channel , 2003, Nature.

[22]  Martin Caffrey,et al.  Membrane protein crystallization. , 2003, Journal of structural biology.

[23]  Youxing Jiang,et al.  The principle of gating charge movement in a voltage-dependent K+ channel , 2003, Nature.

[24]  K. Hong,et al.  The Lipid–Protein Interface of aShaker K+ Channel , 2000, The Journal of general physiology.

[25]  Francisco Bezanilla,et al.  Voltage-Sensing Residues in the S2 and S4 Segments of the Shaker K+ Channel , 1996, Neuron.

[26]  J. Skehel,et al.  Structure of influenza haemagglutinin at the pH of membrane fusion , 1994, Nature.

[27]  M. Cadene,et al.  X-ray structure of a voltage-dependent K+ channel , 2003, Nature.