content
Troponin I
Troponin I is a part of the troponin complex. It binds to actin in thin myofilaments to hold the troponin-tropomyosin complex in place. The letter I is given due to its inhibitory character.
The tissue specific subtypes are:
Slow-twitch skeletal muscle isoform troponin I, TNNI1 (1q31.3, 191042 )
Fast-twitch skeletal muscle isoform troponin I, TNNI2 (11p15.5, 191043 )
Cardiac troponin I, TNNI3 (19q13.4, 191044 )
External links
Histology : muscle tissue
skeletal muscle/general
epimysium ,
fascicle ,
perimysium ,
endomysium ,
muscle fiber (
intrafusal ,
extrafusal ),
myofibril
sarcomere (a, i, and h bands; z and m lines) , myofilaments (thin filament/actin , thick filament/myosin , elastic filament/titin , nebulin ), tropomyosin , troponin (T , C , I )
costamere (dystrophin , α,β-dystrobrevin , syncoilin , synemin/desmuslin , dysbindin , sarcoglycan , dystroglycan , sarcospan ), desmin
neuromuscular junction , motor unit , muscle spindle , excitation-contraction coupling , sliding filament mechanism
myoblast ,
satellite cell ,
sarcoplasm ,
sarcolemma ,
sarcoplasmic reticulum ,
T-tubule
cardiac muscle
smooth muscle
Proteins of the cytoskeleton
Microfilaments
Intermediate filaments
type 1 and 2 (
Cytokeratin ,
type I ,
type II ) -
type 3 (
Desmin ,
GFAP ,
Peripherin ,
Vimentin ) -
type 4 (
Internexin ,
Nestin ,
Neurofilament ,
Synemin ,
Syncoilin ) -
type 5 (
Lamin A ,
B )
Microtubules
Catenins
Nonhuman
Other
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