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MYBPC1 gene

myosin binding protein C1

Normal Function

The MYBPC1 gene provides instructions for making one version of a protein called myosin binding protein C. Several versions of myosin binding protein C are produced from different genes; these proteins are found in muscles used for movement (skeletal muscles) and in heart (cardiac) muscle. The version produced from the MYBPC1 gene, which is known as the slow skeletal isoform, is found primarily in skeletal muscles.

The slow isoform of myosin binding protein C is active during the development of skeletal muscles. Researchers believe that this protein helps regulate the tensing of muscle fibers (muscle contraction). Myosin binding protein C interacts with other muscle proteins, including myosin, actin, and titin. These proteins play essential roles in muscle cell structures called sarcomeres, which generate the mechanical force needed for muscles to contract. Studies suggest that myosin binding protein C contributes to the stability and maintenance of sarcomeres.

Health Conditions Related to Genetic Changes

Distal arthrogryposis type 1

At least one mutation in the MYBPC1 gene has been found to cause distal arthrogryposis type 1, a disorder characterized by joint deformities (contractures) in the hands and feet. The mutation changes a single protein building block (amino acid) in the slow isoform of myosin binding protein C. Specifically, the mutation replaces the amino acid tryptophan with the amino acid arginine at protein position 236 (written as Trp236Arg or W236R). It is unclear how the defective protein leads to contractures in people with distal arthrogryposis type 1, or why the joint problems are typically limited to the hands and feet. However, researchers speculate that contractures may be related to problems with muscle contraction that limit the movement of joints before birth.

More About This Health Condition

Other Names for This Gene

  • C-protein, skeletal muscle slow isoform
  • skeletal muscle C-protein
  • slow MyBP-C

Additional Information & Resources

Tests Listed in the Genetic Testing Registry

Scientific Articles on PubMed

Catalog of Genes and Diseases from OMIM

Gene and Variant Databases


  • Ackermann MA, Kontrogianni-Konstantopoulos A. Myosin binding protein-C slow: an intricate subfamily of proteins. J Biomed Biotechnol. 2010;2010:652065. doi: 10.1155/2010/652065. Epub 2010 Apr 8. Citation on PubMed or Free article on PubMed Central
  • Gurnett CA, Desruisseau DM, McCall K, Choi R, Meyer ZI, Talerico M, Miller SE, Ju JS, Pestronk A, Connolly AM, Druley TE, Weihl CC, Dobbs MB. Myosin binding protein C1: a novel gene for autosomal dominant distal arthrogryposis type 1. Hum Mol Genet. 2010 Apr 1;19(7):1165-73. doi: 10.1093/hmg/ddp587. Epub 2010 Jan 2. Citation on PubMed or Free article on PubMed Central
  • Weber FE, Vaughan KT, Reinach FC, Fischman DA. Complete sequence of human fast-type and slow-type muscle myosin-binding-protein C (MyBP-C). Differential expression, conserved domain structure and chromosome assignment. Eur J Biochem. 1993 Sep 1;216(2):661-9. doi: 10.1111/j.1432-1033.1993.tb18186.x. Citation on PubMed

The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.