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Information on EC 3.1.3.53 - [myosin-light-chain] phosphatase

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EC Tree
     3 Hydrolases
         3.1 Acting on ester bonds
             3.1.3 Phosphoric-monoester hydrolases
                3.1.3.53 [myosin-light-chain] phosphatase
IUBMB Comments
The enzyme is composed of three subunits. The holoenzyme dephosphorylates myosin light chains and EC 2.7.11.18, myosin-light-chain kinase, but not myosin; the catalytic subunit acts on all three substrates.
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This record set is specific for:
UNIPROT: O60237
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Word Map
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Synonyms
mypt1, myosin phosphatase, mlcp, hek-293 cell, mlc phosphatase, myosin phosphatase target subunit 1, ppp1r12a, myosin phosphatase targeting subunit 1, smpp-1m, smooth muscle myosin phosphatase, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
MLCP
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-
-
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MLCPase
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-
-
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MLCPPase
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-
-
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MP
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-
-
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myosin light chain kinase phosphatase
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myosin light chain phosphatase
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myosin phosphatase
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phosphatase, myosin
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phosphatase, myosin light-chain kinase
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-
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PP-1G
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-
-
-
PP-1M
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-
-
-
PP-2A
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-
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protein phosphatase 2A
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-
-
-
SMMP
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-
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smooth muscle myosin phosphatase
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smooth muscle phosphatase I-IV
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-
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SMP-I
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-
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SMP-II
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-
-
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SMP-III
-
-
-
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SMP-IV
-
-
-
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SMPP
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-
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-
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
hydrolysis of phosphoric ester
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-
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-
SYSTEMATIC NAME
IUBMB Comments
[myosin-light-chain]-phosphate phosphohydrolase
The enzyme is composed of three subunits. The holoenzyme dephosphorylates myosin light chains and EC 2.7.11.18, myosin-light-chain kinase, but not myosin; the catalytic subunit acts on all three substrates.
CAS REGISTRY NUMBER
COMMENTARY hide
108658-39-5
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86417-96-1
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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
additional information
?
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role of the heart-specific small regulatory subunit hHS-M21 of MLCP
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-
?
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
the small regulatory subunit hHS-M21 is expressed only in cardiac muscle, not in smooth muscle
Manually annotated by BRENDA team
additional information
expression profiles of the heart-specific small subunit hHS-M21 and of the large myosin-binding subunit of MLCP
Manually annotated by BRENDA team
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
MYPT2_HUMAN
982
0
110404
Swiss-Prot
other Location (Reliability: 2)
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
the heart-specific small regulatory subunit hHS-M21 of MLCP increases the Ca2+ sensitivity in muscle and binds to the large myosin-binding subunit, it plays a regulatory role in cardiac muscle contraction by its binding to the large subunit MBS, MBS encoded by the MYPT1 gene, not by MYPT2, is the main target subunit of hHS-M21
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant heart-specific small regulatory subunit isoforms hHS-M21 A and B of MLCP
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
cDNAs encoding the heart-specific small regulatory subunit isoforms hHS-M21 A and B of MLCP are cloned, sequenced and expressed in Escherichia coli, the small subunit is the product of the same gene as the large subunit: MYPT2, genomic structure of the gene for hHS-M21, the genes MYPT1 and MYPT2 encoding the large myosin-binding subunit MBS are cloned and expressed in Escherichia coli, genomic organisation of the MYPT2 gene, located on chromosome 1q32
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Arimura, T.; Suematsu, N.; Zhou, Y.B.; Nishimura, J.; Satoh, S.; Takeshita, A.; Kanaide, H.; Kimura, A.
Identification, characterization, and functional analysis of heart-specific myosin light chain phosphatase small subunit
J. Biol. Chem.
276
6073-6082
2001
Homo sapiens (O60237)
Manually annotated by BRENDA team