Evidence map›Paper›PMID 9758332›Full record

ReviewJournal of bioenergetics and biomembranes1998

Structures and functions of calcium channel beta subunits.

L Birnbaumer, N Qin, R Olcese, E Tareilus, D Platano, J Costantin, E Stefani

Abstract readComparative StudyReview
PubMed Publisher
In one paragraph

Review in Journal of bioenergetics and biomembranes, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 90 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
90citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

90 citing papers in PubMed, 1 synthesis or guideline pooled it, 223 citations in OpenAlex.

  1. Calcium and arrhythmogenesis.Physiological reviews · 2007
    Pooled it
  2. Article
  3. Roles and Regulation of Voltage-gated Calcium Channels in Arrhythmias.The Journal of innovations in cardiac rhythm management · 2019
    Review
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  19. Article
  20. Ahnak1 is a tuneable modulator of cardiac Ca(v)1.2 calcium channel activity.Journal of muscle research and cell motility · 2011
    Article

30 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

L BirnbaumerDepartment of Anesthesiology, School of Medicine, University of California, Los Angeles, USA.
N Qin
R Olcese
E Tareilus
D Platano
J Costantin
E Stefani
University of California, Los Angeles · US

Funding

VOLTAGE GATED CALCIUM CHANNELS--STRUCTURE/FUNCTIONR01AR038970 · NIAMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI STEFANI, ENRICO · 1987 to 1998
–
STRUCTURE/FUNCTION ANALYSIS OF VOLTAGE-GATED CA CHANNELSR01AR043411 · NIAMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI BIRNBAUMER, LUTZ · 1994 to 1998
–
NIAMS NIH HHS AR38970NIAMS NIH HHS AR43411
6 · The paper itself

Abstract

Calcium channel beta subunits have profound effects on how alpha1 subunits perform. In this article we summarize our present knowledge of the primary structures of beta subunits as deduced from cDNAs and illustrate their different properties. Upon co-expression with alpha1 subunits, the effects of beta subunits vary somewhat between L-type and non-L-type channels mostly because the two types of channels have different responses to voltage which are affected by beta subunits, such as long-lasting prepulse facilitation of alpha1C (absent in alpha1E) and inhibition by G protein betagamma dimer of alpha1E, absent in alpha1C. One beta subunit, a brain beta2a splice variant that is palmitoylated, has several effects not seen with any of the others, and these are due to palmitoylation. We also illustrate the finding that functional expression of alpha1 in oocytes requires a beta subunit even if the final channel shows no evidence for its presence. We propose two structural models for Ca2+ channels to account for "alpha1 alone" channels seen in cells with limited beta subunit expression. In one model, beta dissociates from the mature alpha1 after proper folding and membrane insertion. Regulated channels seen upon co-expression of high levels of beta would then have subunit composition alpha1beta. In the other model, the "chaperoning" beta remains associated with the mature channel and "alpha1 alone" channels would in fact be alpha1beta channels. Upon co-expression of high levels of beta the regulated channels would have composition [alpha1beta]beta.

Indexed as

Calcium Channels, L-TypeAmino Acid SequenceAnimalsBinding SitesCalciumCalcium ChannelsChromosome MappingChromosomes, HumanHumansIon Channel GatingMiceMolecular Sequence DataMuscle ProteinsOocytesPalmitic AcidPhosphorylationCACNB2 protein, humanCacnb2 protein, mouseCacnb2 protein, ratCACNB4 protein, humanCacnb4 protein, mouseCacnb4 protein, ratCalciumCalcium ChannelsCalcium Channels, L-TypeMuscle ProteinsPalmitic AcidRecombinant Fusion Proteins

Identifiers

PMID9758332
OpenAlexW1978335820

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.