Importance of the Different |β Subunits in the Membrane Expression of the α1A and α2 Calcium Channel Subunits: Studies Using a Depolarization‐sensitive α1A Antibody

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Population

COS-7 cells and native alpha1A channels in dorsal root ganglion neurons

Comparison

Transient coexpression of calcium channel… vs Expression of alpha1A or alpha2-delta subunits…

Design

Preclinical

Authors

Discussion

Confirms beta subunits chaperone alpha1A membrane targeting in animal cells; extends trafficking mechanisms but leaves open in vivo relevance.

Population

COS-7 cells and native alpha1A channels in dorsal root ganglion neurons

Intervention

Transient coexpression of calcium channel subunits (alpha1A, alpha2-delta) with beta subunits (beta1b, beta2a, beta3b, beta4)

Comparator

Expression of alpha1A or alpha2-delta subunits alone

Outcome

Plasma membrane expression and localization of alpha1A and alpha2 subunitssurrogate

Beta subunits play a crucial chaperone role in directing the translocation and correct membrane orientation of alpha1A calcium channel subunits.

Brice et al. (1997) studied this question.

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Confirms beta subunits chaperone alpha1A membrane targeting in animal cells; extends trafficking mechanisms but leaves open in vivo relevance.