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Cited by 526

The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.

FK506 binding protein associated with the calcium release channel (ryanodine receptor).

Open access
Jayaraman, T, Brillantes, A.M., Timerman, A.P., Fleischer, S, Erdjument-Bromage, H, Tempst, P, Marks, A.R.·1992·Journal of Biological Chemistry

Abstract

The calcium release channel (CRC)/ryanodine receptor (RyRec) has been identified as the foot structure of the sarcoplasmic reticulum (SR) and provides the pathway for calcium efflux required for excitation-contraction coupling in skeletal muscle. The CRC has previously been reported to consist of four identical 565-kDa protomers. We now report the identification of a 12-kDa protein which is tightly associated with highly purified RyRec from rabbit skeletal muscle SR. N-terminal amino acid sequencing and cDNA cloning demonstrates that the 12-kDa protein from fast twitch skeletal muscle is the binding protein for the immunosuppressant drug FK506. In humans, FK506 binds to the 12-kDa FK506-binding protein (FKBP12) and blocks calcium-dependent T cell activation. We find that FKBP12 and the RyRec are tightly associated in skeletal muscle SR on the basis of: 1) co-purification through sequential heparin-agarose, hydroxylapatite, and size exclusion chromatography columns; 2) coimmunoprecipitation of the RyRec and FKBP12 with anti-FKBP12 antibodies; and 3) subcellular localization of both proteins to the terminal cisternae of the SR, and not in the longitudinal tubules of SR, in fast twitch skeletal muscle. The molar ratio of FKBP12 to RyRec in highly purified RyRec preparations is approximately 1:4, indicating that one FKBP12 molecule is associated with each calcium release channel/foot structure.

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Metadata

Authors
Jayaraman, T., Brillantes, A. M., Timerman, A. P., Fleischer, S., Erdjument-Bromage, H., Tempst, P., & Marks, A. R.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1992-05
Volume
267
Issue
14
Pages
9474-9477
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1549665441
Cited by
526
References
3
FWCI
8.91
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: FK506 binding protein associated with the calcium release channel (ryanodine receptor). https://app.cochat.ai/papers/10.1016/s0021-9258(19)50114-4
The paper
Jayaraman, T., Brillantes, A. M., Timerman, A. P., Fleischer, S., Erdjument-Bromage, H., Tempst, P., & Marks, A. R. (1992). FK506 binding protein associated with the calcium release channel (ryanodine receptor). Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(19)50114-4

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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