Recombinant Rat Troponin I, cardiac muscle (Tnni3)

Code CSB-YP340566RA
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Source Yeast
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Code CSB-EP340566RA
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Source E.coli
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Code CSB-EP340566RA-B
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Source E.coli
Conjugate Avi-tag Biotinylated
E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.
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Code CSB-BP340566RA
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Source Baculovirus
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Code CSB-MP340566RA
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Source Mammalian cell
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Product Details

>85% (SDS-PAGE)
Target Names
Uniprot No.
Alternative Names
Tnni3; Ctni; Tni; Troponin I; cardiac muscle; Cardiac troponin I
Rattus norvegicus (Rat)
Expression Region
Target Protein Sequence
Protein Length
Full Length of Mature Protein
Tag Info
Tag type will be determined during the manufacturing process.
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer before Lyophilization
Tris/PBS-based buffer, 6% Trehalose, pH 8.0
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Please contact us to get it.

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Target Background

Troponin I is the inhibitory subunit of troponin, the thin filament regulatory complex which confers calcium-sensitivity to striated muscle actomyosin ATPase activity.
Gene References into Functions
  1. Pim-1 is a novel kinase that phosphorylates cTnI primarily at Ser23/24 and Ser150 in cardiomyocytes, which in turn may modulate myofilament function under a variety of physiological and pathophysiological conditions. PMID: 29544221
  2. Cardiac troponin I mutation P83S present in hypertrophic cardiomyopathy changes the contractile myofibril properties and modulation by PKA-mediated phosphorylation. PMID: 27150586
  3. Troponin I interaction with calcium and Troponin C in cardiac muscle PMID: 28864299
  4. Compared to cTnI(WT), both truncations displayed greater Ca(2+)-sensitivity and faster cross-bridge attachment rates at both SLs. Furthermore, cTnI(1-167) slowed MgADP release rate and enhanced cross-bridge binding. Our findings imply that cTnI-MD truncations affect the blocked-to closed-state transition(s) and destabilize the closed-state position of tropomyosin. PMID: 28958680
  5. PKC phosphorylates cardiac troponin I (cTnI) S23/24, S43/45 and T144 to fine tune myocyte function. PMID: 28587770
  6. These findings demonstrate that S-nitrosylation and S-glutathionylation exert opposing effects on Ca(2+) sensitivity in mammalian FT muscle fibers, mediated by competitive actions on Cys134 of TnIf. PMID: 27974300
  7. the interaction between cTnC and cTnI in skinned papillary muscle strips is dependent on sarcomere length PMID: 26944554
  8. cTnIS43/45N is a functionally conservative substitution, and may be appropriate for use as a phospho-null in rodent models designed for studies on PKC modulation of cardiac performance PMID: 26869200
  9. This study suggests that cTnI point of care tests can accurately determine heat stroke (HS) severity and could serve as simple, portable, cost-effective HS field tests. PMID: 26290107
  10. The present study utilizes viral gene transfer of cTnI with phosphomimetic S43D and/or S45D substitutions to evaluate their individual and combined influences on function in intact adult cardiac myocytes. PMID: 25481661
  11. Results suggest that weakened troponin C interaction with cTnI, via PKA phosphorylation of cTnI, may slow thin filament activation and result in increased myofilament relaxation kinetics PMID: 25185555
  12. The findings elucidate the pathogenesis of MI, and the gradual increase in serum adropin could be a novel diagnostic marker and serve as an alternative to troponin-I measurement for diagnosing MI. PMID: 24932661
  13. molecular determinants of cardiac myocyte performance as conferred by isoform-specific TnI residues PMID: 24853739
  14. Arsenic induced ventricular hypertrophy occurs via MEF2A/CAMKK2/CALM3/TNNI3 signaling. PMID: 25089838
  15. Data indicate that the serum TnI level was significantly greater in the acute coronary syndrome (ACS) group compared to the control group. PMID: 23904327
  16. A cutoff value of 4.8ng/mL for cTnI could be used as early as 8h after MI to accurately identify infarct in this model, whereas echocardiographic images taken 48h after MI predicted the infarcted area 14days after MI. PMID: 23764111
  17. Mutation in the C helix of cTnC can reduce Ca2+ binding affinity and cTnC-cTnI interaction. PMID: 23454346
  18. Hypertrophic cardiomyopathy related mutations R146G/Q and R163W impact interactions between cTnI and cardiac troponin C or actin. PMID: 23246786
  19. Aan increase in calpain activity may enhance cTnI degradation in the myocardium of tail-suspended rats. PMID: 20945043
  20. Normal developing myocardium and skeletal muscle transiently share both sk-fMHC and cTn-I proteins. PMID: 22808244
  21. the functional impact of cardiac troponin I (cTnI) phosphorylation by protein kinase A PMID: 22684024
  22. cTnC, cTnI, cTnT and cTm are not only present in myofilaments of ventricular cardiomyocytes in culture but are also within their nuclei; significantly, these four proteins appear between days 3 and 5 in both myofilaments and nuclei PMID: 22364878
  23. differential histidine ionization may be necessary for cTnI A164H to act as a molecular sensor capable of modulating sarcomere performance in response to changes in the cytosolic milieu PMID: 22500757
  24. Structural dynamics of C-domain of cardiac troponin I protein in reconstituted thin filament. PMID: 22207765
  25. PKC phosphorylation of cTnI may be maladaptive and potentially associated with cardiac dysfunction PMID: 22052912
  26. Cardiac function and phosphorylation of PLB and cTnI were compared in pacing, isoproterenol treatment, and combined pacing and isoproterenol treatment in isolated working heart. PMID: 21876643
  27. Ulinastatin may protect myocardium from the damage resulted from sepsis in a rat model, probably by lowering expressions of cTnI, TNF-alpha and ET-1. PMID: 20594472
  28. Data show that dual expression of two CM mutants, tropomyosin mutant A63V and cardiac troponin mutant R146G, were shown to additively slow myocyte relaxation beyond either mutant studied in isolation. PMID: 20161772
  29. Time-dependent cTnI breakdown occurs during global ischemia independent of reperfusion. cTnI breakdown during ischemia is further increased in presence of antioxidants. ROS generated during ischemia may play cTnI protective role. PMID: 15142843
  30. cardiac Troponin I Thr144 plays an important role in the acute acceleration of relaxation, whereas Ser23/Ser24 contributes to relaxation during more prolonged activation of protein kinase C by endothelin PMID: 16236710
  31. GATA elements control repression of cTNI promoter activity in skeletal muscle cells. PMID: 17875210
  32. Overexpression of heat shock protein 27 protects against ischaemia/reperfusion-induced cardiac dysfunction via stabilization of troponin I and T. PMID: 18397962
  33. cTnI-R145G expression influences the response to adrenergic stimulation dependent on the receptor subtype PMID: 18548271
  34. Metabolic inhibition of cardiomyocytes induces a parallel release of intact cTnI and its degradation products, starting only after onset of irreversible cardiomyocyte damage. PMID: 18721805
  35. the nNOS-PMCA4b complex regulates contractility via cAMP and phosphorylation of both PLB and cTnI. PMID: 19278978

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Protein Families
Troponin I family
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