MKX

Protein-coding gene in the species Homo sapiens

MKX

Identifiers

Aliases

MKX, C10orf48, IFRX, IRXL1, mohawk homeobox

External IDs

OMIM: 601332; MGI: 2687286; HomoloGene: 72239; GeneCards: MKX; OMA:MKX - orthologs

Gene location (Human)

Chr.	Chromosome 10 (human)^[1]

Band	10p12.1	Start	27,672,874 bp^[1]
Band	10p12.1	End	27,746,060 bp^[1]

Gene location (Mouse)

Chr.	Chromosome 18 (mouse)^[2]

Band	18 A1\|18 4.53 cM	Start	6,934,518 bp^[2]
Band	18 A1\|18 4.53 cM	End	7,004,780 bp^[2]

RNA expression pattern

Bgee

Human

Mouse (ortholog)

Top expressed in

Achilles tendon

endothelial cell

right coronary artery

prostate

popliteal artery

tibial arteries

testicle

stromal cell of endometrium

anterior pituitary

left coronary artery

Top expressed in

hand

cumulus cell

somite

foot

genital tubercle

lacrimal gland

female urethra

tail of embryo

desmocranium

calvaria

More reference expression data

BioGPS

n/a

Gene ontology
Molecular function	sequence-specific DNA binding DNA binding DNA-binding transcription factor activity, RNA polymerase II-specific
Cellular component	nucleus
Biological process	regulation of transcription, DNA-templated muscle organ development multicellular organism development regulation of transcription by RNA polymerase II
Sources:Amigo / QuickGO

Orthologs

Species

Human

Mouse

Entrez


283078


210719

Ensembl


ENSG00000150051


ENSMUSG00000061013

UniProt


Q8IYA7


Q8BIA3

RefSeq (mRNA)


NM_001242702 NM_173576


NM_177595

RefSeq (protein)


NP_001229631 NP_775847


NP_808263

Location (UCSC)

Chr 10: 27.67 – 27.75 Mb

Chr 18: 6.93 – 7 Mb

PubMed search

^[3]

^[4]

Wikidata

View/Edit Human

View/Edit Mouse

Homeobox protein Mohawk, also known as iroquois homeobox protein-like 1, is a protein that in humans is encoded by the MKX (mohawk homeobox) gene.^[5] MKX is a member of an Iroquois (IRX) family-related class of 'three-amino acid loop extension' (TALE) atypical homeobox proteins characterized by 3 additional amino acids in the loop region between helix I and helix II of the homeodomain.^[5]^[6]

Function

MKX is a transcription factor that regulates tendon differentiation during embryological development. Knocking out this gene in mouse embryos results in them developing hypoplastic tendons containing less type I collagen.^[7] MKX binds directly to the promoter of MyoD and represses its expression, negatively regulating muscle differentiation.^[8]

Expression of MKX is maintained in adult tendon tissues, decreasing as a result of ageing or osteoarthritis. Collagen fibres in tendons become more dense and thick following mechanical stimulation as a result of exercise,^[9] and MKX is essential in this mechanosensory process.^[10]

References

^ ^a ^b ^c GRCh38: Ensembl release 89: ENSG00000150051 – Ensembl, May 2017
^ ^a ^b ^c GRCm38: Ensembl release 89: ENSMUSG00000061013 – Ensembl, May 2017
^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ ^a ^b "Entrez Gene: mohawk homeobox".
^ Anderson DM, Arredondo J, Hahn K, Valente G, Martin JF, Wilson-Rawls J, Rawls A (March 2006). "Mohawk is a novel homeobox gene expressed in the developing mouse embryo". Developmental Dynamics. 235 (3): 792–801. doi:10.1002/dvdy.20671. PMID 16408284. S2CID 29018840.
^ Ito Y, Toriuchi N, Yoshitaka T, Ueno-Kudoh H, Sato T, Yokoyama S, Nishida K, Akimoto T, Takahashi M, Miyaki S, Asahara H (June 2010). "The Mohawk homeobox gene is a critical regulator of tendon differentiation". Proceedings of the National Academy of Sciences of the United States of America. 107 (23): 10538–42. Bibcode:2010PNAS..10710538I. doi:10.1073/pnas.1000525107. PMC 2890854. PMID 20498044.
^ Chuang HN, Hsiao KM, Chang HY, Wu CC, Pan H (July 2014). "The homeobox transcription factor Irxl1 negatively regulates MyoD expression and myoblast differentiation". The FEBS Journal. 281 (13): 2990–3003. doi:10.1111/febs.12837. PMID 24814716. S2CID 19733342.
^ Nakahara H, Hasegawa A, Otabe K, Ayabe F, Matsukawa T, Onizuka N, Ito Y, Ozaki T, Lotz MK, Asahara H (August 2013). "Transcription factor Mohawk and the pathogenesis of human anterior cruciate ligament degradation". Arthritis and Rheumatism. 65 (8): 2081–9. doi:10.1002/art.38020. PMC 3840305. PMID 23686683.
^ Kayama T, Mori M, Ito Y, Matsushima T, Nakamichi R, Suzuki H, Ichinose S, Saito M, Marumo K, Asahara H (April 2016). "Gtf2ird1-Dependent Mohawk Expression Regulates Mechanosensing Properties of the Tendon". Molecular and Cellular Biology. 36 (8): 1297–309. doi:10.1128/MCB.00950-15. PMC 4836271. PMID 26884464.

Robertson NG, Khetarpal U, Gutiérrez-Espeleta GA, Bieber FR, Morton CC (September 1994). "Isolation of novel and known genes from a human fetal cochlear cDNA library using subtractive hybridization and differential screening". Genomics. 23 (1): 42–50. doi:10.1006/geno.1994.1457. PMID 7829101.
Weinmann A, Galle PR, Teufel A (September 2005). "In silico characterization of an Iroquois family-related homeodomain protein". International Journal of Molecular Medicine. 16 (3): 443–8. doi:10.3892/ijmm.16.3.443. PMID 16077953.
Anderson DM, Arredondo J, Hahn K, Valente G, Martin JF, Wilson-Rawls J, Rawls A (March 2006). "Mohawk is a novel homeobox gene expressed in the developing mouse embryo". Developmental Dynamics. 235 (3): 792–801. doi:10.1002/dvdy.20671. PMID 16408284. S2CID 29018840.
Barbe L, Lundberg E, Oksvold P, Stenius A, Lewin E, Björling E, Asplund A, Pontén F, Brismar H, Uhlén M, Andersson-Svahn H (March 2008). "Toward a confocal subcellular atlas of the human proteome". Molecular & Cellular Proteomics. 7 (3): 499–508. doi:10.1074/mcp.M700325-MCP200. PMID 18029348.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

Transcription factors and intracellular receptors

(1) Basic domains

(1.1) Basic leucine zipper (bZIP)

Activating transcription factor
- AATF
- 1
- 2
- 3
- 4
- 5
- 6
- 7
AP-1
- c-Fos
- FOSB
- FOSL1
- FOSL2
- JDP2
- c-Jun
- JUNB
- JunD
BACH
- 1
- 2
BATF
BLZF1
C/EBP
- α
- β
- γ
- δ
- ε
- ζ
CREB
- 1
- 3
- L1
CREM
DBP
DDIT3
GABPA
GCN4
HLF
MAF
- B
- F
- G
- K
NFE
- 2
- L1
- L2
- L3
NFIL3
NRL
NRF
- 1
- 2
- 3
XBP1

(1.2) Basic helix-loop-helix (bHLH)

Group A	AS-C ASCL1 ASCL2 ATOH1 HAND 1 2 MESP2 Myogenic regulatory factors MyoD Myogenin MYF5 MYF6 NeuroD 1 2 Neurogenins 1 2 3 OLIG 1 2 Paraxis TCF15 Scleraxis SLC LYL1 TAL 1 2 Twist
Group B	FIGLA Myc c-Myc l-Myc n-Myc MXD4 TCF4
Group C bHLH-PAS	AhR AHRR ARNT ARNTL ARNTL2 CLOCK HIF 1A EPAS1 3A NPAS 1 2 3 PER 1 2 3 Period SIM 1 2
Group D	BHLH 2 3 9 Pho4 ID 1 2 3 4
Group E	HES 1 2 3 4 5 6 7 HEY 1 2 L
Group F bHLH-COE	EBF1

(1.3) bHLH-ZIP

AP-4
MAX
- MXD1
- MXD3
MITF
MNT
MLX
MLXIPL
MXI1
Myc
SREBP
- 1
- 2
USF1

(1.4) NF-1

NFI
- A
- B
- C
- X
SMAD
- R-SMAD
  - 1
  - 2
  - 3
  - 5
  - 9
- I-SMAD
  - 6
  - 7
- 4)

(1.5) RF-X

RFX
- 1
- 2
- 3
- 4
- 5
- 6
- ANK

(1.6) Basic helix-span-helix (bHSH)

AP-2
- α
- β
- γ
- δ
- ε

(2) Zinc finger DNA-binding domains

(2.1) Nuclear receptor (Cys₄)

subfamily 1	Thyroid hormone α β CAR FXR LXR α β PPAR α β/δ γ PXR RAR α β γ ROR α β γ Rev-ErbA α β VDR
subfamily 2	COUP-TF (I II Ear-2 HNF4 α γ PNR RXR α β γ Testicular receptor 2 4 TLX
subfamily 3	Steroid hormone Androgen Estrogen α β Glucocorticoid Mineralocorticoid Progesterone Estrogen related α β γ
subfamily 4	NUR NGFIB NOR1 NURR1
subfamily 5	LRH-1 SF1
subfamily 6	GCNF
subfamily 0	DAX1 SHP

(2.2) Other Cys₄

GATA
- 1
- 2
- 3
- 4
- 5
- 6
MTA
- 1
- 2
- 3
TRPS1

(2.3) Cys₂His₂

General transcription factors
- TFIIA
- TFIIB
- TFIID
- TFIIE
  - 1
  - 2
- TFIIF
- 1
- 2
  - TFIIH
  - 1
  - 2
  - 4
  - 2I
  - 3A
  - 3C1
  - 3C2

ATBF1
BCL
- 6
- 11A
- 11B
CTCF
E4F1
EGR
- 1
- 2
- 3
- 4
ERV3
GFI1
GLI family
- 1
- 2
- 3
- REST
- S1
- S2
- YY1
HIC
- 1
- 2
HIVEP
- 1
- 2
- 3
IKZF
- 1
- 2
- 3
ILF
- 2
- 3
Sp/KLF family
- KLF
  - 1
  - 2
  - 3
  - 4
  - 5
  - 6
  - 7
  - 8
  - 9
  - 10
  - 11
  - 12
  - 13
  - 14
  - 15
  - 17
- SP
  - 1
  - 2
  - 4
  - 7
  - 8
MTF1
MYT1
OSR1
PRDM9
SALL
- 1
- 2
- 3
- 4
TSHZ3
WT1
Zbtb7
- 7A
- 7B
ZBTB
- 11
- 16
- 17
- 20
- 21
- 32
- 33
- 40
zinc finger
- 3
- 7
- 9
- 10
- 19
- 22
- 24
- 33B
- 34
- 35
- 41
- 43
- 44
- 51
- 74
- 143
- 146
- 148
- 165
- 202
- 217
- 219
- 238
- 239
- 259
- 267
- 268
- 281
- 300
- 318
- 330
- 346
- 350
- 365
- 366
- 384
- 423
- 451
- 452
- 471
- 593
- 638
- 644
- 649
- 655
- 804A

(2.4) Cys₆

HIVEP1

(2.5) Alternating composition

AIRE
DIDO1
GRLF1
ING
- 1
- 2
- 4
JARID
- 1A
- 1B
- 1C
- 1D
- 2
JMJD1B

(2.6) WRKY

WRKY

(3) Helix-turn-helix domains

(3.1) Homeodomain

Antennapedia
ANTP class

protoHOX Hox-like	ParaHox Gsx 1 2 Xlox PDX1 Cdx 1 2 4 extended Hox: Evx1 Evx2 MEOX1 MEOX2 Homeobox A1 A2 A3 A4 A5 A7 A9 A10 A11 A13 B1 B2 B3 B4 B5 B6 B7 B8 B9 B13 C4 C5 C6 C8 C9 C10 C11 C12 C13 D1 D3 D4 D8 D9 D10 D11 D12 D13 GBX1 GBX2 MNX1
metaHOX NK-like	BARHL1 BARHL2 BARX1 BARX2 BSX DBX 1 2 DLX 1 2 3 4 5 6 EMX 1 2 EN 1 2 HHEX HLX LBX1 LBX2 MSX 1 2 NANOG NKX 2-1 2-2 2-3 2-5 3-1 3-2 HMX1 HMX2 HMX3 6-1 6-2 NATO TLX1 TLX2 TLX3 VAX1 VAX2

other

ARX
CRX
CUTL1
FHL
- 1
- 2
- 3
HESX1
HOPX
LMX
- 1A
- 1B
NOBOX
TALE
- IRX
  - 1
  - 2
  - 3
  - 4
  - 5
  - 6
  - MKX
- MEIS
  - 1
  - 2
- PBX
  - 1
  - 2
  - 3
- PKNOX
  - 1
  - 2
- SIX
  - 1
  - 2
  - 3
  - 4
  - 5
PHF
- 1
- 3
- 6
- 8
- 10
- 16
- 17
- 20
- 21A
POU domain
- PIT-1
- BRN-3: A
- B
- C
- Octamer transcription factor: 1
- 2
- 3/4
- 6
- 7
- 11
SATB2
ZEB
- 1
- 2

(3.2) Paired box

PAX
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
PRRX
- 1
- 2
PROP1
PHOX
- 2A
- 2B
RAX
SHOX
SHOX2
VSX1
VSX2
Bicoid
- GSC
- BICD2
- OTX
  - 1
  - 2
- PITX
  - 1
  - 2
  - 3

(3.3) Fork head / winged helix

E2F
- 1
- 2
- 3
- 4
- 5
FOX proteins
- A1
- A2
- A3
- B1
- B2
- C1
- C2
- D1
- D2
- D3
- D4
- D4L1
- D4L3
- D4L4
- D4L5
- D4L6
- E1
- E3
- F1
- F2
- G1
- H1
- I1
- I2
- I3
- J1
- J2
- J3
- K1
- K2
- L1
- L2
- M1
- N1
- N2
- N3
- N4
- O1
- O3
- O4
- O6
- P1
- P2
- P3
- P4
- Q1
- R1
- R2
- S1

(3.4) Heat shock factors

HSF
- 1
- 2
- 4

(3.5) Tryptophan clusters

ELF
- 2
- 4
- 5
EGF
ELK
- 1
- 3
- 4
ERF
ETS
- 1
- 2
- ERG
- SPIB
ETV
- 1
- 4
- 5
- 6
FLI1
Interferon regulatory factors
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
MYB
MYBL2

(3.6) TEA domain

transcriptional enhancer factor
- 1
- 2
- 3
- 4

(4) β-Scaffold factors with minor groove contacts

(4.1) Rel homology region	NF-κB NFKB1 NFKB2 REL RELA RELB NFAT C1 C2 C3 C4 5
(4.2) STAT	STAT 1 2 3 4 5 6
(4.3) p53-like	p53 p63 p73 family p53 TP63 p73 TBX 1 2 3 5 19 21 22 TBR1 TBR2 TFT MYRF
(4.4) MADS box	Mef2 A B C D SRF
(4.6) TATA-binding proteins	TBP TBPL1
(4.7) High-mobility group	BBX HMGB 1 2 3 4 HMGN 1 2 3 4 HNF 1A 1B SOX 1 2 3 4 5 6 8 9 10 11 12 13 14 15 18 21 SRY SSRP1 TCF/LEF TCF 1 3 4 LEF1 TOX 1 2 3 4
(4.9) Grainyhead	TFCP2
(4.10) Cold-shock domain	CSDA YBX1
(4.11) Runt	CBF CBFA2T2 CBFA2T3 RUNX1 RUNX2 RUNX3 RUNX1T1

(0) Other transcription factors

(0.2) HMGI(Y)	HMGA 1 2 HBP1
(0.3) Pocket domain	Rb RBL1 RBL2
(0.5) AP-2/EREBP-related factors	Apetala 2 EREBP B3
(0.6) Miscellaneous	ARID 1A 1B 2 3A 3B 4A CAP IFI 16 35 MLL 2 3 T1 MNDA NFY A B C Rho/Sigma