Keratin 21

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Keratin 21 is a type I cytokeratin which expresses immunologically specific fusion protein. It is not found in humans, but only in Rattus norvegicus.

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

Desmin, GFAP, Peripherin, Vimentin

Type 4

Internexin, Nestin, Neurofilament (NEFL, NEFM, NEFH), Synemin, Syncoilin

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)