Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27830500
&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
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\27830500
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Subcell+Biochem
2016 ; 81
(ä): 21-76
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Functions of Intracellular Retinoid Binding-Proteins
#MMPMID27830500
Napoli JL
Subcell Biochem
2016[]; 81
(ä): 21-76
PMID27830500
show ga
Multiple binding and transport proteins facilitate many aspects of retinoid
biology through effects on retinoid transport, cellular uptake, metabolism, and
nuclear delivery. These include the serum retinol binding protein sRBP (aka
Rbp4), the plasma membrane sRBP receptor Stra6, and the intracellular retinoid
binding-proteins such as cellular retinol-binding proteins (CRBP) and cellular
retinoic acid binding-proteins (CRABP). sRBP transports the highly lipophilic
retinol through an aqueous medium. The major intracellular retinol-binding
protein, CRBP1, likely enhances efficient retinoid use by providing a sink to
facilitate retinol uptake from sRBP through the plasma membrane or via Stra6,
delivering retinol or retinal to select enzymes that generate retinyl esters or
retinoic acid, and protecting retinol/retinal from excess catabolism or
opportunistic metabolism. Intracellular retinoic acid binding-proteins (CRABP1
and 2, and FABP5) seem to have more diverse functions distinctive to each, such
as directing retinoic acid to catabolism, delivering retinoic acid to specific
nuclear receptors, and generating non-canonical actions. Gene ablation of
intracellular retinoid binding-proteins does not cause embryonic lethality or
gross morphological defects. Metabolic and functional defects manifested in
knockouts of CRBP1, CRBP2 and CRBP3, however, illustrate their essentiality to
health, and in the case of CRBP2, to survival during limited dietary vitamin A.
Future studies should continue to address the specific molecular interactions
that occur between retinoid binding-proteins and their targets and their precise
physiologic contributions to retinoid homeostasis and function.
|Alcohol Oxidoreductases/metabolism
[MESH]
|Aldehyde Dehydrogenase/metabolism
[MESH]
|Animals
[MESH]
|Biological Transport
[MESH]
|Cell Nucleus/metabolism
[MESH]
|Eye/metabolism
[MESH]
|Gene Knockout Techniques
[MESH]
|Homeostasis
[MESH]
|Humans
[MESH]
|Intestinal Mucosa/metabolism
[MESH]
|Mice
[MESH]
|Mice, Knockout
[MESH]
|Models, Molecular
[MESH]
|Neoplasm Proteins/metabolism
[MESH]
|Protein Conformation
[MESH]
|Receptors, Cytoplasmic and Nuclear/metabolism
[MESH]