Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=23645670
&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 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 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\23645670
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2013 ; 288
(26
): 19166-76
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Vascular Ehlers-Danlos syndrome mutations in type III collagen differently stall
the triple helical folding
#MMPMID23645670
Mizuno K
; Boudko S
; Engel J
; Bächinger HP
J Biol Chem
2013[Jun]; 288
(26
): 19166-76
PMID23645670
show ga
Vascular Ehlers-Danlos syndrome (EDS) type IV is the most severe form of EDS. In
many cases the disease is caused by a point mutation of Gly in type III collagen.
A slower folding of the collagen helix is a potential cause for
over-modifications. However, little is known about the rate of folding of type
III collagen in patients with EDS. To understand the molecular mechanism of the
effect of mutations, a system was developed for bacterial production of
homotrimeric model polypeptides. The C-terminal quarter, 252 residues, of the
natural human type III collagen was attached to (GPP)7 with the type XIX collagen
trimerization domain (NC2). The natural collagen domain forms a triple helical
structure without 4-hydroxylation of proline at a low temperature. At 33 °C, the
natural collagenous part is denatured, but the C-terminal (GPP)7-NC2 remains
intact. Switching to a low temperature triggers the folding of the type III
collagen domain in a zipper-like fashion that resembles the natural process. We
used this system for the two known EDS mutations (Gly-to-Val) in the middle at
Gly-910 and at the C terminus at Gly-1018. In addition, wild-type and Gly-to-Ala
mutants were made. The mutations significantly slow down the overall rate of
triple helix formation. The effect of the Gly-to-Val mutation is much more severe
compared with Gly-to-Ala. This is the first report on the folding of collagen
with EDS mutations, which demonstrates local delays in the triple helix
propagation around the mutated residue.