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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Biometals
2017 ; 30
(6
): 823-840
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The six metal binding domains in human copper transporter, ATP7B: molecular
biophysics and disease-causing mutations
#MMPMID29063292
Ariöz C
; Li Y
; Wittung-Stafshede P
Biometals
2017[Dec]; 30
(6
): 823-840
PMID29063292
show ga
Wilson Disease (WD) is a hereditary genetic disorder, which coincides with a
dysfunctional copper (Cu) metabolism caused by mutations in ATP7B, a
membrane-bound P(1B)-type ATPase responsible for Cu export from hepatic cells.
The N-terminal part (~ 600 residues) of the multi-domain 1400-residue ATP7B
constitutes six metal binding domains (MBDs), each of which can bind a copper
ion, interact with other ATP7B domains as well as with different proteins.
Although the ATP7B's MBDs have been investigated in vitro and in vivo
intensively, it remains unclear how these domains modulate overall structure,
dynamics, stability and function of ATP7B. The presence of six MBDs is unique to
mammalian ATP7B homologs, and many WD causing missense mutations are found in
these domains. Here, we have summarized previously reported in vitro biophysical
data on the MBDs of ATP7B and WD point mutations located in these domains.
Besides the demonstration of where the research field stands today, this review
showcasts the need for further biophysical investigation about the roles of MBDs
in ATP7B function. Molecular mechanisms of ATP7B are important not only in the
development of new WD treatment but also for other aspects of human physiology
where Cu transport plays a role.