TNNC2

Troponin C type 2 (fast)

PDB rendering based on 1a2x.

Available structures

Ortholog search: PDBe, RCSB

List of PDB id codes
1a2x, 1avs, 1blq, 1ncx, 1ncy, 1ncz, 1npq, 1skt, 1smg, 1tcf, 1tn4, 1tnp, 1tnq, 1tnw, 1tnx, 1top, 1trf, 1ytz, 1yv0, 1zac, 2tn4, 4tnc, 5tnc

Identifiers

Symbol

TNNC2

External IDs

OMIM: 191039 MGI: 98780 HomoloGene: 55727 GeneCards: TNNC2 Gene

Gene ontology
Molecular function	• actin binding • calcium ion binding
Cellular component	• cytosol • troponin complex
Biological process	• skeletal muscle contraction • regulation of muscle contraction • muscle filament sliding
Sources: Amigo / QuickGO

RNA expression pattern

More reference expression data

Orthologs

Species

Human

Mouse

RefSeq (mRNA)

RefSeq (protein)

Location (UCSC)

Chr 20:
44.45 – 44.46 Mb

Chr 2:
164.78 – 164.78 Mb

PubMed search

Troponin C, skeletal muscle is a protein that in humans is encoded by the TNNC2 gene.^[1]^[2]

Troponin (Tn), a key protein complex in the regulation of striated muscle contraction, is composed of 3 subunits. The Tn-I subunit inhibits actomyosin ATPase, the Tn-T subunit binds tropomyosin and Tn-C, while the Tn-C subunit binds calcium and overcomes the inhibitory action of the troponin complex on actin filaments. The protein encoded by this gene is the Tn-C subunit.^[2]

References

↑ Gahlmann R, Kedes L (Aug 1990). "Cloning, structural analysis, and expression of the human fast twitch skeletal muscle troponin C gene". J Biol Chem 265 (21): 12520–8. PMID 2373703.
↑ 2.0 2.1 "Entrez Gene: TNNC2 troponin C type 2 (fast)".

Romero-Herrera AE, Castillo O, Lehmann H (1977). "Human skeletal muscle proteins. The primary structure of troponin C.". J. Mol. Evol. 8 (3): 251–70. doi:10.1007/bf01730999. PMID 978749.
Tomasselli AG, Hui JO, Adams L et al. (1991). "Actin, troponin C, Alzheimer amyloid precursor protein and pro-interleukin 1 beta as substrates of the protease from human immunodeficiency virus.". J. Biol. Chem. 266 (22): 14548–53. PMID 1907279.
Gahlmann R, Wade R, Gunning P, Kedes L (1988). "Differential expression of slow and fast skeletal muscle troponin C. Slow skeletal muscle troponin C is expressed in human fibroblasts.". J. Mol. Biol. 201 (2): 379–91. doi:10.1016/0022-2836(88)90145-3. PMID 3166492.
Prentice H, Kloner RA, Prigozy T et al. (1995). "Tissue restricted gene expression assayed by direct DNA injection into cardiac and skeletal muscle.". J. Mol. Cell. Cardiol. 26 (10): 1393–401. doi:10.1006/jmcc.1994.1157. PMID 7869399.
Tiso N, Rampoldi L, Pallavicini A et al. (1997). "Fine mapping of five human skeletal muscle genes: alpha-tropomyosin, beta-tropomyosin, troponin-I slow-twitch, troponin-I fast-twitch, and troponin-C fast.". Biochem. Biophys. Res. Commun. 230 (2): 347–50. doi:10.1006/bbrc.1996.5958. PMID 9016781.
Townsend PJ, Yacoub MH, Barton PJ (1998). "Assignment of the human fast skeletal muscle troponin C gene (TNNC2) between D20S721 and GCT10F11 on chromosome 20 by somatic cell hybrid analysis.". Ann. Hum. Genet. 61 (Pt 5): 457–9. doi:10.1046/j.1469-1809.1997.6150457.x. PMID 9459007.
Vassylyev DG, Takeda S, Wakatsuki S et al. (1998). "Crystal structure of troponin C in complex with troponin I fragment at 2.3-A resolution.". Proc. Natl. Acad. Sci. U.S.A. 95 (9): 4847–52. doi:10.1073/pnas.95.9.4847. PMC 20176. PMID 9560191.
Deloukas P, Matthews LH, Ashurst J et al. (2002). "The DNA sequence and comparative analysis of human chromosome 20.". Nature 414 (6866): 865–71. doi:10.1038/414865a. PMID 11780052.
Strausberg RL, Feingold EA, Grouse LH et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
Gerhard DS, Wagner L, Feingold EA et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.

PDB gallery

1a2x: COMPLEX OF TROPONIN C WITH A 47 RESIDUE (1-47) FRAGMENT OF TROPONIN I

1avs: X-RAY CRYSTALLOGRAPHIC STUDY OF CALCIUM-SATURATED N-TERMINAL DOMAIN OF TROPONIN C

1blq: STRUCTURE AND INTERACTION SITE OF THE REGULATORY DOMAIN OF TROPONIN-C WHEN COMPLEXED WITH THE 96-148 REGION OF TROPONIN-I, NMR, 29 STRUCTURES

1ncx: TROPONIN C

1ncy: TROPONIN-C, COMPLEX WITH MANGANESE

1ncz: TROPONIN C

1npq: structure of a rhodamine-labeled N-domain Troponin C mutant (Ca2+ saturated) in complex with skeletal Troponin I 115-131

1skt: SOLUTION STRUCTURE OF APO N-DOMAIN OF TROPONIN C, NMR, 40 STRUCTURES

1smg: CALCIUM-BOUND E41A MUTANT OF THE N-DOMAIN OF CHICKEN TROPONIN C, NMR, 40 STRUCTURES

1tcf: CRYSTAL STRUCTURE OF CALCIUM-SATURATED RABBIT SKELETAL TROPONIN C

1tn4: FOUR CALCIUM TNC

1tnp: STRUCTURES OF THE APO AND CALCIUM TROPONIN-C REGULATORY DOMAINS: THE MUSCLE CONTRACTION SWITCH

1tnq: STRUCTURES OF THE APO AND CALCIUM TROPONIN-C REGULATORY DOMAINS: THE MUSCLE CONTRACTION SWITCH

1tnw: NMR SOLUTION STRUCTURE OF CALCIUM SATURATED SKELETAL MUSCLE TROPONIN C

1tnx: NMR SOLUTION STRUCTURE OF CALCIUM SATURATED SKELETAL MUSCLE TROPONIN C

1top: STRUCTURE OF CHICKEN SKELETAL MUSCLE TROPONIN-C AT 1.78 ANGSTROMS RESOLUTION

1trf: SOLUTION STRUCTURE OF THE TR1C FRAGMENT OF SKELETAL MUSCLE TROPONIN-C

1ytz: Crystal structure of skeletal muscle troponin in the Ca2+-activated state

1yv0: Crystal structure of skeletal muscle troponin in the Ca2+-free state

1zac: N-DOMAIN OF TROPONIN C FROM CHICKEN SKELETAL MUSCLE, NMR, MINIMIZED AVERAGE STRUCTURE

2tn4: FOUR CALCIUM TNC

4tnc: REFINED STRUCTURE OF CHICKEN SKELETAL MUSCLE TROPONIN C IN THE TWO-CALCIUM STATE AT 2-ANGSTROMS RESOLUTION

5tnc: REFINED CRYSTAL STRUCTURE OF TROPONIN C FROM TURKEY SKELETAL MUSCLE AT 2.0 ANGSTROMS RESOLUTION

Proteins of the cytoskeleton

Human

Microfilaments
(ABPs)

Myofilament

Actins	A1 A2 B C1 G1 G2

Myosins	I MYO1A MYO1B MYO1C MYO1D MYO1E MYO1F MYO1G MYO1H) II MYH1 MYH2 MYH3 MYH4 MYH6 MYH7 MYH7B MYH8 MYH9 MYH10 MYH11 MYH13 MYH14 MYH15 MYH16 III MYO3A MYO3B V MYO5A MYO5B MYO5C VI MYO6 VII MYO7A MYO7B IX MYO9A MYO9B X MYO10 XV MYO15A XVIII MYO18A MYO18B LC MYL1 MYL2 MYL3 MYL4 MYL5 MYL6 MYL6B MYL7 MYL9 MYLIP MYLK MYLK2 MYLL1

Other	Tropomodulin 1 2 3 4 Troponin T 1 2 3 C 1 2 I 1 2 3 Tropomyosin 1 2 3 4 Actinin 1 2 3 4 Arp2/3 complex actin depolymerizing factors Cofilin 1 2 Destrin Gelsolin Profilin 1 2 Titin

Other

Wiskott-Aldrich syndrome protein
Fibrillin
Filamin
- FLNA
- FLNB
- FLNC
Espin
TRIOBP

IFs

Type 1/2
(Keratin,
Cytokeratin)

Epithelial keratins (soft alpha-keratins)	type I/chromosome 17 10 12 13 14 15 16 17 19 20 chromosome 12 18 none 21 type II/chromosome 12 1 2A 3 4 5 6A 6B 7 8 9

Hair keratins (hard alpha-keratins)	type I/chromosome 17 31 32 33A 33B 34 35 36 37 38 type II/chromosome 12 81 82 83 84 85 86

Ungrouped alpha	chromosome 17 23 24 25 26 27 28 39 40 chromosome 12 71 72 73 74 75 76 77 78 79 80

Not alpha	Beta-keratin

Type 3

Type 4

Type 5

Lamin A
B

Microtubules/
MAPs

Kinesins	KIF1A KIF1B KIF2A KIF2C KIF3B KIF3C KIF4A KIF4B KIF5A KIF5B KIF5C KIF6 KIF7 KIF9 KIF11 KIF12 KIF13A KIF13B KIF14 KIF15 KIF16B KIF17 KIF18A KIF18B KIF19 KIF20A KIF20B KIF21A KIF21B KIF22 KIF23 KIF24 KIF25 KIF26A KIF26B KIF27 KIFC1 KIFC2 KIFC3

Dyneins	axonemal: DNAH1 DNAH2 DNAH3 DNAH5 DNAH6 DNAH7 DNAH8 DNAH9 DNAH10 DNAH11 DNAH12 DNAH13 DNAH14 DNAH17 DNAI1 DNAI2 DNALI1 DNAL1 DNAL4 cytoplasmic: DYNC1H1 DYNC2H1 DYNC1I1 DYNC1I2 DYNC1LI1 DYNC1LI2 DYNC2LI1 DYNLL1 DYNLL2 DYNLRB1 DYNLRB2 DYNLT1 DYNLT3

Other	Tau protein Dynactin DCTN1 Tubulins TUBA1A TUBA1B TUBA1C TUBA3C TUBA3D TUBA3E TUBA4A TUBA8 Stathmin Tektin TEKT1 TEKT2 TEKT3 TEKT4 TEKT5 Dynamin DNM1 DNM2 DNM3

Catenins

Membrane

Dystrophin
- Dystroglycan
Utrophin
Ankyrin
- ANK1
- ANK2
- ANK3
Spectrin
- SPTA1
- SPTAN1
- SPTB
- SPTBN1
- SPTBN2
- SPTBN4
- SPTBN5

Other

Nonhuman

See also: cytoskeletal defects

Index of cells

Description	Structure nucleus chromosome genetics Organelles peroxisome cytoskeleton centrosome epithelia cilia mitochondria Membranes proteins cell adhesions Membrane transport ion channels vesicular transport solute carrier ABC transporters ATPase oxidoreduction-driven

Disease	Structural peroxisome cytoskeleton cilia mitochondria nucleus scleroprotein Membrane channelopathy solute carrier ATPase ABC transporters other extracellular ligands cell surface receptors intracellular signalling Vesicular transport Pore-forming toxins

TNNC2

References

Further reading