Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27106602
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\27106602
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Am+Soc+Mass+Spectrom
2016 ; 27
(6
): 1099-104
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Negative Ions Enhance Survival of Membrane Protein Complexes
#MMPMID27106602
Liko I
; Hopper JT
; Allison TM
; Benesch JL
; Robinson CV
J Am Soc Mass Spectrom
2016[Jun]; 27
(6
): 1099-104
PMID27106602
show ga
Membrane protein complexes are commonly introduced to the mass spectrometer
solubilized in detergent micelles. The collisional activation used to remove the
detergent, however, often causes protein unfolding and dissociation. As in the
case for soluble proteins, electrospray in the positive ion mode is most commonly
used for the study of membrane proteins. Here we show several distinct advantages
of employing the negative ion mode. Negative polarity can yield lower average
charge states for membrane proteins solubilized in saccharide detergents, with
enhanced peak resolution and reduced adduct formation. Most importantly, we
demonstrate that negative ion mode electrospray ionization (ESI) minimizes
subunit dissociation in the gas phase, allowing access to biologically relevant
oligomeric states. Together, these properties mean that intact membrane protein
ions can be generated in a greater range of solubilizing detergents. The
formation of negative ions, therefore, greatly expands the possibilities of using
mass spectrometry on this intractable class of protein. Graphical Abstract ?.