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Reviewed, UniProtKB/Swiss-Prot P54265 (DMPK_MOUSE)

Last modified July 22, 2008. Version 72. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (3) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Myotonin-protein kinase
    EC=2.7.11.1
Alternative name(s):
    Myotonic dystrophy protein kinase
      Short name=MDPK
    DM-kinase
      Short name=DMK
    DMPK
    MT-PK
Gene names
Name: Dmpk
Synonyms: Dm15, Mdpk
OrganismMus musculus (Mouse)
Taxonomic identifier10090 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaSciurognathiMuroideaMuridaeMurinaeMus

Protein attributes

Sequence length631 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at transcript level.

General annotation (Comments)

Function

Critical to the modulation of cardiac contractility and to the maintenance of proper cardiac conduction activity. Phosphorylates phospholamban.

Catalytic activity

ATP + a protein = ADP + a phosphoprotein.

Cofactor

Magnesium By similarity.

Enzyme regulation

Activated in response to G protein second messengers. Maintained in an inactive conformation by the negative autoregulatory C-terminal coiled-coil region. Coiled-coil mediated oligomerization correlated with enhanced catalytic activity as is proteolytically cleavage near the C-terminus By similarity.

Tissue specificity

Expressed in all tissues examinated to date, with a predominance in brain, skeletal muscle, heart, and other tissues containing smooth muscle. Primarily detected in striated muscle structures of the 14.5 day embryo, including all major muscles in the skeletal structures, cardiac muscle, diaphragm, and the smooth muscle of the lung and gut. In the heart, expression is restricted to the cardiomyocytes in the ventricle and atrium.

Sequence similarities

Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. DMPK subfamily.

Contains 1 AGC-kinase C-terminal domain.

Contains 1 protein kinase domain.

Alternative products

This entry describes 10 isoforms produced by alternative splicing. [Align] [Select]

Notes: Additional isoforms seem to exist.
Isoform 1 (identifier: P54265-1)

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform 2 (identifier: P54265-2)

The sequence of this isoform differs from the canonical sequence as follows:
     328-356: Missing.
Isoform 3 (identifier: P54265-3)

The sequence of this isoform differs from the canonical sequence as follows:
     378-382: Missing.
Isoform 4 (identifier: P54265-4)

The sequence of this isoform differs from the canonical sequence as follows:
     378-382: Missing.
     412-416: DNQVP → LKRPT
     417-631: Missing.
Isoform 5 (identifier: P54265-5)

The sequence of this isoform differs from the canonical sequence as follows:
     536-537: AI → DP
     538-631: Missing.
Isoform 6 (identifier: P54265-6)

The sequence of this isoform differs from the canonical sequence as follows:
     378-382: Missing.
     536-537: AI → DP
     538-631: Missing.
Isoform 7 (identifier: P54265-7)

The sequence of this isoform differs from the canonical sequence as follows:
     536-557: AITGVPSPRATDPPSHLDGPPA → GESLTCFQPRGHWVEMGGMLGV
     558-631: Missing.
Isoform 8 (identifier: P54265-8)

The sequence of this isoform differs from the canonical sequence as follows:
     552-631: LDGPPAVAVG...WCFPGATFAP → MAPRPWLWAS...SREPPSPPEP
Isoform 9 (identifier: P54265-9)

The sequence of this isoform differs from the canonical sequence as follows:
     378-382: Missing.
     552-631: LDGPPAVAVG...WCFPGATFAP → MAPRPWLWAS...SREPPSPPEP
Isoform 10 (identifier: P54265-10)

The sequence of this isoform differs from the canonical sequence as follows:
     552-562: LDGPPAVAVGQ → ASRQILPKGTP
     563-631: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical view

Molecule processing

Chain1 – 631631Myotonin-protein kinase

Regions

Domain71 – 339269Protein kinase
Domain340 – 41576AGC-kinase C-terminal
Nucleotide binding77 – 859ATP By similarity
Coiled coil464 – 53269 Potential
Compositional bias597 – 6048Poly-Ala

Sites

Active site1951Proton acceptor By similarity
Binding site1001ATP By similarity

Amino acid modifications

Modified residue2161Phosphoserine; by autocatalysis By similarity
Modified residue2281Phosphoserine; by autocatalysis By similarity
Modified residue2341Phosphothreonine; by autocatalysis By similarity

Natural variations

Alternative sequence328 – 35629Missing in isoform 2.
Alternative sequence378 – 3825Missing in isoform 3, isoform 4, isoform 6 and isoform 9.
Alternative sequence412 – 4165DNQVP → LKRPT in isoform 4.
Alternative sequence417 – 631215Missing in isoform 4.
Alternative sequence536 – 55722AITGV…DGPPA → GESLTCFQPRGHWVEMGGML GV in isoform 7.
Alternative sequence536 – 5372AI → DP in isoform 5 and isoform 6.
Alternative sequence538 – 63194Missing in isoform 5 and isoform 6.
Alternative sequence552 – 63180LDGPP…ATFAP → MAPRPWLWASARWWGQAPCT AVTCCSLPGSLGLAYPRRVA CSCSPLLWLLPPHWAALGWW PIPAVSPQSGVSREPPSPPE P in isoform 8 and isoform 9.
Alternative sequence552 – 56211LDGPPAVAVGQ → ASRQILPKGTP in isoform 10.
Alternative sequence558 – 63174Missing in isoform 7.
Alternative sequence563 – 63169Missing in isoform 10.

Sequences

Sequence LengthMass (Da)Tools
Isoform 1 [UniParc].

Last modified October 1, 1996. Version 1.
Checksum: 5EE800A37EA81DF4

FASTA63169,602
        10         20         30         40         50         60 
MSAEVRLRQL QQLVLDPGFL GLEPLLDLLL GVHQELGASH LAQDKYVADF LQWVEPIAAR 

        70         80         90        100        110        120 
LKEVRLQRDD FEILKVIGRG AFSEVAVVKM KQTGQVYAMK IMNKWDMLKR GEVSCFREER 

       130        140        150        160        170        180 
DVLVKGDRRW ITQLHFAFQD ENYLYLVMEY YVGGDLLTLL SKFGERIPAE MARFYLAEIV 

       190        200        210        220        230        240 
MAIDSVHRLG YVHRDIKPDN ILLDRCGHIR LADFGSCLKL QPDGMVRSLV AVGTPDYLSP 

       250        260        270        280        290        300 
EILQAVGGGP GAGSYGPECD WWALGVFAYE MFYGQTPFYA DSTAETYAKI VHYREHLSLP 

       310        320        330        340        350        360 
LADTVVPEEA QDLIRGLLCP AEIRLGRGGA GDFQKHPFFF GLDWEGLRDS VPPFTPDFEG 

       370        380        390        400        410        420 
ATDTCNFDVV EDRLTAMVSG GGETLSDMQE DMPLGVRLPF VGYSYCCMAF RDNQVPDPTP 

       430        440        450        460        470        480 
MELEALQLPV SDLQGLDLQP PVSPPDQVAE EADLVAVPAP VAEAETTVTL QQLQEALEEE 

       490        500        510        520        530        540 
VLTRQSLSRE LEAIRTANQN FSSQLQEAEV RNRDLEAHVR QLQERMEMLQ APGAAAITGV 

       550        560        570        580        590        600 
PSPRATDPPS HLDGPPAVAV GQCPLVGPGP MHRRHLLLPA RIPRPGLSEA RCLLLFAAAL 

       610        620        630 
AAAATLGCTG LVAYTGGLTP VWCFPGATFA P 

« Hide

Isoform 2 [UniParc].

Checksum: 8A9EBB4E930E5EB0
Show »

60266,397
Isoform 3 [UniParc].

Checksum: 84F11B047BB340EF
Show »

62669,244
Isoform 4 [UniParc].

Checksum: 24F3F18634D0131C
Show »

41146,532
Isoform 5 [UniParc].

Checksum: 21F148D98B3657BB
Show »

53760,161
Isoform 6 [UniParc].

Checksum: A79E9629B958241E
Show »

53259,803
Isoform 7 [UniParc].

Checksum: D0247256B70FD18C
Show »

55762,322
Isoform 8 [UniParc].

Checksum: D1576187FFBB8824
Show »

63270,329
Isoform 9 [UniParc].

Checksum: C5DD789C58BE9379
Show »

62769,972
Isoform 10 [UniParc].

Checksum: C8D00A5C40223DBD
Show »

56262,682

References

[1]"Structure and genomic sequence of the myotonic dystrophy (DM kinase) gene."
Mahadevan M.S., Amemiya C., Jansen G., Sabourin L., Baird S., Neville C.E., Wormskamp N., Segers B., Batzer M., Lamerdin J., de Jong P.J., Wieringa B., Korneluk R.G.
Hum. Mol. Genet. 2:299-304(1993) [PubMed: 8499920] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE.
[2]"No imprinting involved in the expression of DM-kinase mRNAs in mouse and human tissues."
Jansen G., Bartolomei M., Kalscheuer V., Merkx G., Wormskamp N., Mariman E., Smeets D., Ropers H.-H., Wieringa B.
Hum. Mol. Genet. 2:1221-1227(1993) [PubMed: 8401505] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE.
Strain: 129/Sv.
[3]"Characterization of the myotonic dystrophy region predicts multiple protein isoform-encoding mRNAs."
Jansen G., Mahadevan M.S., Amemiya C., Wormskamp N., Segers B., Hendriks W., O'Hoy K., Baird S., Sabourin L., Lennon G., Jap P.L., Iles D., Coerwinkel M., Hofker M., Carrano A.V., de Jong P.J., Korneluk R.G., Wieringa B.
Nat. Genet. 1:261-266(1992) [PubMed: 1302022] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE OF 117-631 (ISOFORMS 2; 4; 5 AND 8).
Tissue: Brain.
[4]"Constitutive and regulated modes of splicing produce six major myotonic dystrophy protein kinase (DMPK) isoforms with distinct properties."
Groenen P.J.T.A., Wansink D.G., Coerwinkel M., van den Broek W., Jansen G., Wieringa B.
Hum. Mol. Genet. 9:605-616(2000) [PubMed: 10699184] [Abstract]
Cited for: ALTERNATIVE SPLICING (ISOFORMS 1; 3; 5; 6; 8 AND 9).
[5]"Myotonic dystrophy protein kinase phosphorylates phospholamban and regulates calcium uptake in cardiomyocyte sarcoplasmic reticulum."
Kaliman P., Catalucci D., Lam J.T., Kondo R., Gutierrez J.C., Reddy S., Palacin M., Zorzano A., Chien K.R., Ruiz-Lozano P.
J. Biol. Chem. 280:8016-8021(2005) [PubMed: 15598648] [Abstract]
Cited for: FUNCTION, TISSUE SPECIFICITY.
+Additional computationally mapped references.

Cross-references

Sequence databases

Z38015 Genomic DNA. Translation: CAA86113.1.
Z21503 expand/collapse EMBL AC list , Z21504, Z21505, Z21506 Genomic DNA. Translation: CAA79715.1.
S60313 mRNA. Translation: AAC60667.1.
S60314 mRNA. Translation: AAC60666.1.
S60315 mRNA. Translation: AAC60665.1.
S60316 mRNA. Translation: AAC60664.1.
PIRI78393.
I78394.
I78395.
I78396.
S71829.
RefSeqNP_115794.1.
UniGeneMm.6529

3D structure databases

HSSPHSSP built from PDB template 1GZK based on UniProtKB P31751.
SMRP54265. Positions 463-529.
ModBaseSearch...

Genome annotation databases

EnsemblENSMUSG00000030409. Mus musculus. [Contig view]
GeneID13400.
KEGGmmu:13400.

Organism-specific databases

MGIMGI:94906. Dmpk.

Phylogenomic databases

HOGENOMP54265.
HOVERGENP54265.

Gene expression databases

ArrayExpressP54265.
CleanExMM_DMPK.
GermOnlineENSMUSG00000030409. Mus musculus.

Family and domain databases

InterProIPR014930. DMPK_coil.
IPR000961. Pkinase_C.
IPR000719. Prot_kinase_core.
IPR017441. Protein_kinase_ATP_bd_CS.
IPR017442. Se/Thr_pkinase-rel.
IPR008271. Ser_thr_pkin_AS.
IPR002290. Ser_thr_pkinase.
[Graphical view]
PfamPF08826. DMPK_coil. 1 hit.
PF00069. Pkinase. 1 hit.
PF00433. Pkinase_C. 1 hit.
[Graphical view]
ProDomPD000001. Prot_kinase. 1 hit.
[Graphical view] [Entries sharing at least one domain]
SMARTSM00133. S_TK_X. 1 hit.
SM00220. S_TKc. 1 hit.
[Graphical view]
PROSITEPS51285. AGC_KINASE_CTER. 1 hit.
PS00107. PROTEIN_KINASE_ATP. 1 hit.
PS50011. PROTEIN_KINASE_DOM. 1 hit.
PS00108. PROTEIN_KINASE_ST. 1 hit.
[Graphical view]
BLOCKSSearch...

Other Resources

SOURCESearch...
ProtoNetSearch...

Entry information

Entry nameDMPK_MOUSE
AccessionPrimary (citable) accession number: