General Information of Drug Transporter (DT)
DT ID DTD0512 Transporter Info
Gene Name KCNMA1
Transporter Name Calcium-activated potassium channel subunit alpha-1
Gene ID
3778
UniProt ID
Q12960
Post-Translational Modification of This DT
Overview of KCNMA1 Modification Sites with Functional and Structural Information
Sequence
PTM type
X-Depalmitoylation X-Methylation X-Palmitoylation X-Phosphorylation X-S-palmitoylation X-Sulfoxidation X: Amino Acid

Depalmitoylation

  Unclear Residue

          1 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Affecting the surface membrane expression of KCNMA1 [1] , [2]

Role of PTM

Surface Expression Modulation

Related Enzyme

Acyl-protein thioesterase 1 (LYPLA1)
Lysophospholipase-like protein 1 (LYPLAL1)

Experimental Method

Co-Immunoprecipitation

Detailed Description

Depalmitoylation at KCNMA1 have been reported to affect its surface membrane expression.

Methylation

  Arginine

          1 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Have the potential to influence KCNMA1 [3]

Role of PTM

Potential impacts

Modified Residue

Arginine

Modified Location

1215

Experimental Method

Co-Immunoprecipitation

Detailed Description

Methylation at KCNMA1 Arginine 1215 has the potential to affect its expression or activity.

Palmitoylation

  Unclear Residue

          1 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Regulating the localization of transporters at the plasma membrane [1] , [2]

Role of PTM

Surface Expression Modulation

Related Enzyme

Palmitoyltransferase ZDHHC22 (ZDHHC22)

Experimental Method

Co-Immunoprecipitation

Detailed Description

Palmitoylation at KCNMA1 have been reported to regulate its localization at the plasma membrane.

Phosphorylation

  Serine

        27 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Dissociation of the STREX domain from the plasma membrane of KCNMA1 [4]

Role of PTM

Crosstalk with Other PTMs

Affected Drug/Substrate

Potassium

Results for Drug

Affecting the inward transport of potassium

Modified Residue

Serine

Modified Location

636

Related Enzyme

cAMP-dependent protein kinase catalytic subunit alpha (PRKACA)

Experimental Material(s)

Human embryonic kidney 293 (HEK293) cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 636 have been reported to reduce its S-acylation and lead to dissociation of the STREX domain from the plasma membrane.

  PTM Phenomenon 2

Both sites must be phosphorylated for PKC to inhibit KCNMA1 activity [4]

Role of PTM

Protein Activity Modulation

Affected Drug/Substrate

Potassium

Results for Drug

Affecting the inward transport of potassium

Modified Residue

Serine

Modified Location

700; 1156

Related Enzyme

Protein kinase C alpha type (PRKCA)

Experimental Material(s)

Human embryonic kidney 293 (HEK293) cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation of both KCNMA1 serine 700 and serine 1156 have been reported to be required for PKC to inhibit channel activity.

  PTM Phenomenon 3

Have the potential to influence KCNMA1 [5]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

12

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 12 has the potential to affect its expression or activity.

  PTM Phenomenon 4

Have the potential to influence KCNMA1 [6]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

21

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 21 has the potential to affect its expression or activity.

  PTM Phenomenon 5

Have the potential to influence KCNMA1 [6] , [7]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

22

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 22 has the potential to affect its expression or activity.

  PTM Phenomenon 6

Have the potential to influence KCNMA1 [7] , [8]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

41

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 41 has the potential to affect its expression or activity.

  PTM Phenomenon 7

Have the potential to influence KCNMA1 [9] , [10]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

49

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 49 has the potential to affect its expression or activity.

  PTM Phenomenon 8

Have the potential to influence KCNMA1 [9] , [10]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

50

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 50 has the potential to affect its expression or activity.

  PTM Phenomenon 9

Have the potential to influence KCNMA1 [11]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

511

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 511 has the potential to affect its expression or activity.

  PTM Phenomenon 10

Have the potential to influence KCNMA1 [7] , [12]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

569

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 569 has the potential to affect its expression or activity.

  PTM Phenomenon 11

Have the potential to influence KCNMA1 [11]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

580

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 580 has the potential to affect its expression or activity.

  PTM Phenomenon 12

Have the potential to influence KCNMA1 [11] , [13]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

765

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 765 has the potential to affect its expression or activity.

  PTM Phenomenon 13

Have the potential to influence KCNMA1 [14] , [15]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

778

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 778 has the potential to affect its expression or activity.

  PTM Phenomenon 14

Have the potential to influence KCNMA1 [14] , [15]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

782

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 782 has the potential to affect its expression or activity.

  PTM Phenomenon 15

Have the potential to influence KCNMA1 [16] , [17]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

977

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 977 has the potential to affect its expression or activity.

  PTM Phenomenon 16

Have the potential to influence KCNMA1 [17] , [18]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

978

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 978 has the potential to affect its expression or activity.

  PTM Phenomenon 17

Have the potential to influence KCNMA1 [19] , [20]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

982

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 982 has the potential to affect its expression or activity.

  PTM Phenomenon 18

Have the potential to influence KCNMA1 [21]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

992

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 992 has the potential to affect its expression or activity.

  PTM Phenomenon 19

Have the potential to influence KCNMA1 [14] , [16]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1188

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1188 has the potential to affect its expression or activity.

  PTM Phenomenon 20

Have the potential to influence KCNMA1 [16]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1190

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1190 has the potential to affect its expression or activity.

  PTM Phenomenon 21

Have the potential to influence KCNMA1 [14] , [22]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1193

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1193 has the potential to affect its expression or activity.

  PTM Phenomenon 22

Have the potential to influence KCNMA1 [23]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1200

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1200 has the potential to affect its expression or activity.

  PTM Phenomenon 23

Have the potential to influence KCNMA1 [16] , [17]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1203

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1203 has the potential to affect its expression or activity.

  PTM Phenomenon 24

Have the potential to influence KCNMA1 [16] , [17]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1204

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1204 has the potential to affect its expression or activity.

  PTM Phenomenon 25

Have the potential to influence KCNMA1 [16] , [17]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1205

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1205 has the potential to affect its expression or activity.

  PTM Phenomenon 26

Have the potential to influence KCNMA1 [14] , [19]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1208

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1208 has the potential to affect its expression or activity.

  PTM Phenomenon 27

Have the potential to influence KCNMA1 [14] , [19]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

1211

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Serine 1211 has the potential to affect its expression or activity.

  Threonine

          7 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Have the potential to influence KCNMA1 [11]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

685

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 685 has the potential to affect its expression or activity.

  PTM Phenomenon 2

Have the potential to influence KCNMA1 [24]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

734

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 734 has the potential to affect its expression or activity.

  PTM Phenomenon 3

Have the potential to influence KCNMA1 [14] , [15]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

781

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 781 has the potential to affect its expression or activity.

  PTM Phenomenon 4

Have the potential to influence KCNMA1 [16]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

970

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 970 has the potential to affect its expression or activity.

  PTM Phenomenon 5

Have the potential to influence KCNMA1 [20] , [25]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

1088

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 1088 has the potential to affect its expression or activity.

  PTM Phenomenon 6

Have the potential to influence KCNMA1 [20]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

1091

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 1091 has the potential to affect its expression or activity.

  PTM Phenomenon 7

Have the potential to influence KCNMA1 [14] , [19]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

1212

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Threonine 1212 has the potential to affect its expression or activity.

  Tyrosine

          1 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Have the potential to influence KCNMA1 [26] , [27]

Role of PTM

Potential impacts

Modified Residue

Tyrosine

Modified Location

1086

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at KCNMA1 Tyrosine 1086 has the potential to affect its expression or activity.

S-palmitoylation

  Cysteine

          2 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Dissociation of the STREX domain from the plasma membrane of KCNMA1 [4]

Role of PTM

Crosstalk with Other PTMs

Affected Drug/Substrate

Potassium

Results for Drug

Affecting the inward transport of potassium

Modified Residue

Cysteine

Modified Location

645

Related Enzyme

palmitoyl acyltransferases (ZDHHC1)

Experimental Material(s)

Human embryonic kidney 293 (HEK293) cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

S-palmitoylation at KCNMA1 Cysteine 645 have been reported to lead to dissociation of the STREX domain from the plasma membrane.

  PTM Phenomenon 2

Dissociation of the STREX domain from the plasma membrane of KCNMA1 [4]

Role of PTM

Crosstalk with Other PTMs

Affected Drug/Substrate

Potassium

Results for Drug

Affecting the inward transport of potassium

Modified Residue

Cysteine

Modified Location

646

Related Enzyme

palmitoyl acyltransferases (ZDHHC1)

Experimental Material(s)

Human embryonic kidney 293 (HEK293) cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

S-palmitoylation at KCNMA1 Cysteine 646 have been reported to lead to dissociation of the STREX domain from the plasma membrane.

  Cystine

          3 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Have the potential to influence KCNMA1 [1] , [2]

Role of PTM

Potential impacts

Modified Residue

Cystine

Modified Location

118

Experimental Method

Co-Immunoprecipitation

Detailed Description

S-palmitoylation at KCNMA1 Cystine 118 has the potential to affect its expression or activity.

  PTM Phenomenon 2

Have the potential to influence KCNMA1 [1] , [2]

Role of PTM

Potential impacts

Modified Residue

Cystine

Modified Location

119

Experimental Method

Co-Immunoprecipitation

Detailed Description

S-palmitoylation at KCNMA1 Cystine 119 has the potential to affect its expression or activity.

  PTM Phenomenon 3

Have the potential to influence KCNMA1 [1] , [2]

Role of PTM

Potential impacts

Modified Residue

Cystine

Modified Location

121

Experimental Method

Co-Immunoprecipitation

Detailed Description

S-palmitoylation at KCNMA1 Cystine 121 has the potential to affect its expression or activity.

Sulfoxidation

  Asparagine

          1 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Have the potential to influence KCNMA1 [28]

Role of PTM

Potential impacts

Modified Residue

Asparagine

Modified Location

536

Experimental Method

Co-Immunoprecipitation

Detailed Description

Sulfoxidation at KCNMA1 Asparagine 536 has the potential to affect its expression or activity.

  Phenylalanine

          2 PTM Phenomena Related to This Residue Click to Show/Hide the Full List

  PTM Phenomenon 1

Have the potential to influence KCNMA1 [28]

Role of PTM

Potential impacts

Modified Residue

Phenylalanine

Modified Location

712

Experimental Method

Co-Immunoprecipitation

Detailed Description

Sulfoxidation at KCNMA1 Phenylalanine 712 has the potential to affect its expression or activity.

  PTM Phenomenon 2

Have the potential to influence KCNMA1 [28]

Role of PTM

Potential impacts

Modified Residue

Phenylalanine

Modified Location

739

Experimental Method

Co-Immunoprecipitation

Detailed Description

Sulfoxidation at KCNMA1 Phenylalanine 739 has the potential to affect its expression or activity.
References
1 Distinct acyl protein transferases and thioesterases control surface expression of calcium-activated potassium channels. J Biol Chem. 2012 Apr 27;287(18):14718-25.
2 Palmitoylation of the S0-S1 linker regulates cell surface expression of voltage- and calcium-activated potassium (BK) channels. J Biol Chem. 2010 Oct 22;285(43):33307-33314.
3 dbPTM in 2022: an updated database for exploring regulatory networks and functional associations of protein post-translational modifications. Nucleic Acids Res. 2022 Jan 7;50(D1):D471-D479. (ID: KCMA1_HUMAN)
4 S-acylation dependent post-translational cross-talk regulates large conductance calcium- and voltage- activated potassium (BK) channels. Front Physiol. 2014 Aug 5;5:281.
5 Phosphoproteome analysis of the human Chang liver cells using SCX and a complementary mass spectrometric strategy. Proteomics. 2008 May;8(10):2024-34.
6 Quantitative global phosphoproteomics of human umbilical vein endothelial cells after activation of the Rap signaling pathway. Mol Biosyst. 2013 Apr 5;9(4):732-49.
7 Systematic functional prioritization of protein posttranslational modifications. Cell. 2012 Jul 20;150(2):413-25.
8 Phosphorylation dynamics during early differentiation of human embryonic stem cells. Cell Stem Cell. 2009 Aug 7;5(2):214-26.
9 The mTOR-regulated phosphoproteome reveals a mechanism of mTORC1-mediated inhibition of growth factor signaling. Science. 2011 Jun 10;332(6035):1317-22.
10 Dual phosphoproteomics and chemical proteomics analysis of erlotinib and gefitinib interference in acute myeloid leukemia cells. J Proteomics. 2012 Feb 2;75(4):1343-56.
11 Ischemia in tumors induces early and sustained phosphorylation changes in stress kinase pathways but does not affect global protein levels. Mol Cell Proteomics. 2014 Jul;13(7):1690-704.
12 Automated phosphoproteome analysis for cultured cancer cells by two-dimensional nanoLC-MS using a calcined titania/C18 biphasic column. Anal Sci. 2008 Jan;24(1):161-6.
13 Quantitative phosphoproteomic analysis of acquired cancer drug resistance to pazopanib and dasatinib. J Proteomics. 2018 Jan 6;170:130-140.
14 Proteogenomics connects somatic mutations to signalling in breast cancer. Nature. 2016 Jun 2;534(7605):55-62.
15 CEP128 Localizes to the Subdistal Appendages of the Mother Centriole and Regulates TGF-beta/BMP Signaling at the Primary Cilium. Cell Rep. 2018 Mar 6;22(10):2584-2592.
16 Proteogenomic integration reveals therapeutic targets in breast cancer xenografts. Nat Commun. 2017 Mar 28;8:14864.
17 Identification of Missing Proteins in the Phosphoproteome of Kidney Cancer. J Proteome Res. 2017 Dec 1;16(12):4364-4373.
18 Determination of Site-Specific Phosphorylation Ratios in Proteins with Targeted Mass Spectrometry. J Proteome Res. 2018 Apr 6;17(4):1654-1663.
19 Phosphoproteomics reveals ALK promote cell progress via RAS/ JNK pathway in neuroblastoma. Oncotarget. 2016 Nov 15;7(46):75968-75980.
20 Refined phosphopeptide enrichment by phosphate additive and the analysis of human brain phosphoproteome. Proteomics. 2015 Jan;15(2-3):500-7.
21 Guanylyl cyclase stimulatory coupling to K(Ca) channels. Am J Physiol Cell Physiol. 2000 Dec;279(6):C1938-45.
22 Integrated analysis of global proteome, phosphoproteome, and glycoproteome enables complementary interpretation of disease-related protein networks. Sci Rep. 2015 Dec 11;5:18189.
23 Mutation of protein kinase C phosphorylation site S1076 on alpha-subunits affects BK(Ca) channel activity in HEK-293 cells. Am J Physiol Lung Cell Mol Physiol. 2009 Oct;297(4):L758-66.
24 Phosphoproteomics study on the activated PKC-induced cell death. J Proteome Res. 2013 Oct 4;12(10):4280-301.
25 Defective sphingosine 1-phosphate receptor 1 (S1P1) phosphorylation exacerbates TH17-mediated autoimmune neuroinflammation. Nat Immunol. 2013 Nov;14(11):1166-72.
26 Phosphoproteomics identifies driver tyrosine kinases in sarcoma cell lines and tumors. Cancer Res. 2012 May 15;72(10):2501-11.
27 Phosphoproteome resource for systems biology research. Methods Mol Biol. 2011;694:307-22.
28 Three methionine residues located within the regulator of conductance for K+ (RCK) domains confer oxidative sensitivity to large-conductance Ca2+-activated K+ channels. J Physiol. 2006 Mar 1;571(Pt 2):329-48.

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