TRIM63

TRIM63
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 3DDT, 4M3L, 2D8U
Identifiers
Aliases	TRIM63, IRF, MURF1, MURF2, RNF28, SMRZ, tripartite motif containing 63
External IDs	OMIM: 606131; MGI: 2447992; HomoloGene: 41878; GeneCards: TRIM63; OMA:TRIM63 - orthologs
Gene location (Human) Chr. Chromosome 1 (human) Band 1p36.11 Start 26,051,301 bp End 26,068,436 bp
Gene location (Mouse) Chr. Chromosome 4 (mouse) Band 4|4 D2.3 Start 134,042,431 bp End 134,056,940 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in gastrocnemius muscle tibialis anterior muscle muscle of thigh quadriceps femoris muscle vastus lateralis muscle deltoid muscle Skeletal muscle tissue of rectus abdominis biceps brachii myocardium of left ventricle Skeletal muscle tissue of biceps brachii Top expressed in muscle of thigh knee joint tibialis anterior muscle triceps brachii muscle medial head of gastrocnemius muscle soleus muscle vastus lateralis muscle temporal muscle sternocleidomastoid muscle digastric muscle More reference expression data BioGPS More reference expression data
Gene ontology Molecular function zinc ion binding protein binding titin binding signal transducer activity metal ion binding ubiquitin-protein transferase activity transferase activity Cellular component cytoplasm M band contractile fiber Z discdkac microtubule nucleus intracellular anatomical structure Biological process skeletal muscle atrophy muscle contraction response to glucocorticoid response to interleukin-1 protein ubiquitination response to electrical stimulus involved in regulation of muscle adaptation signal transduction negative regulation of cardiac muscle hypertrophy Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 84676 433766 Ensembl ENSG00000158022 ENSMUSG00000028834 UniProt Q969Q1 Q38HM4 RefSeq (mRNA) NM_032588 NM_001039048 NM_001369245 RefSeq (protein) NP_115977 n/a Location (UCSC) Chr 1: 26.05 – 26.07 Mb Chr 4: 134.04 – 134.06 Mb PubMed search
Wikidata
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E3 ubiquitin-protein ligase TRIM63 is an enzyme that in humans is encoded by the TRIM63 gene.

This gene encodes a member of the RING zinc finger protein family found in striated muscle and iris. The product of this gene is localized to the Z-line and M-line lattices of myofibrils, where titin's N-terminal and C-terminal regions respectively bind to the sarcomere. In vitro binding studies have shown that this protein also binds directly to titin near the region of titin containing kinase activity. Another member of this protein family binds to microtubules. Since these family members can form heterodimers, this suggests that these proteins may serve as a link between titin kinase and microtubule-dependent signal pathways in muscle.

The protein encoded by the Trim63 gene is also called MuRF1. MuRF1 is the name most commonly used in the literature, and it stands for "Muscle RING Finger 1." Structurally, there are two closely related MuRFs, MuRF2 and MuRF3. These also have TRIM codes: MuRF2 is TRIM55; MuRF3 is TRIM54.

Interactions

Trim63/MuRF1 has been shown to be an E3 ubiquitin ligase. Its major substrate is Myosin Heavy Chain. MuRF1 is upregulated during skeletal muscle atrophy – and thus the degradation of myosin heavy chain, which is a major component of the sarcomere, is an important mechanism in the breakdown of skeletal muscle under atrophy conditions. MuRF1 has been shown to be upregulated during denervation, administration of glucocorticoids, immobilization, and casting. All of these treatments cause skeletal muscle atrophy.

TRIM63 has been shown to interact with Titin, GMEB1 and SUMO2.

Further reading

• Bodine SC, Latres E, Baumhueter S, et al. (2001). "Identification of ubiquitin ligases required for skeletal muscle atrophy". Science. 294 (5547): 1704–8. doi:10.1126/science.1065874. PMID 11679633.
• McElhinny AS, Kakinuma K, Sorimachi H, et al. (2002). "Muscle-specific RING finger-1 interacts with titin to regulate sarcomeric M-line and thick filament structure and may have nuclear functions via its interaction with glucocorticoid modulatory element binding protein-1". J. Cell Biol. 157 (1): 125–36. doi:10.1083/jcb.200108089. PMC 2173255. PMID 11927605.
• Wistow G, Bernstein SL, Ray S, et al. (2002). "Expressed sequence tag analysis of adult human iris for the NEIBank Project: steroid-response factors and similarities with retinal pigment epithelium". Mol. Vis. 8: 185–95. PMID 12107412.
• Pizon V, Iakovenko A, Van Der Ven PF, et al. (2003). "Transient association of titin and myosin with microtubules in nascent myofibrils directed by the MURF2 RING-finger protein". J. Cell Sci. 115 (Pt 23): 4469–82. doi:10.1242/jcs.00131. PMID 12414993.
• 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.
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
• 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.
• Kedar V, McDonough H, Arya R, et al. (2005). "Muscle-specific RING finger 1 is a bona fide ubiquitin ligase that degrades cardiac troponin I." Proc. Natl. Acad. Sci. U.S.A. 101 (52): 18135–40. doi:10.1073/pnas.0404341102. PMC 539735. PMID 15601779.
• Witt SH, Granzier H, Witt CC, Labeit S (2005). "MURF-1 and MURF-2 target a specific subset of myofibrillar proteins redundantly: towards understanding MURF-dependent muscle ubiquitination". J. Mol. Biol. 350 (4): 713–22. doi:10.1016/j.jmb.2005.05.021. PMID 15967462.
• Gregory SG, Barlow KF, McLay KE, et al. (2006). "The DNA sequence and biological annotation of human chromosome 1". Nature. 441 (7091): 315–21. doi:10.1038/nature04727. PMID 16710414.
• Doucet M, Russell AP, Léger B, et al. (2007). "Muscle atrophy and hypertrophy signaling in patients with chronic obstructive pulmonary disease". Am. J. Respir. Crit. Care Med. 176 (3): 261–9. doi:10.1164/rccm.200605-704OC. PMID 17478621.