General Information of Drug Transporter (DT)
DT ID DTD0456 Transporter Info
Gene Name SLC6A4
Transporter Name Sodium-dependent serotonin transporter
Gene ID
6532
UniProt ID
P31645
Post-Translational Modification of This DT
Overview ofSLC6A4 Modification Sites with Functional and Structural Information
Sequence
PTM type
X-N-glycosylation X-Palmitoylation X-Palmitoylation X-Phosphorylation X-Phosphorylation X-Ubiquitination X: Amino Acid

N-glycosylation

  Asparagine

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

  PTM Phenomenon1

Have the potential to influence SLC6A4 [1]

Role of PTM

Potential impacts

Modified Residue

Asparagine

Modified Location

208

Experimental Method

Co-Immunoprecipitation

Detailed Description

N-linked Glycosylation at SLC6A4 Asparagine 208 has the potential to affect its expression or activity.

  PTM Phenomenon2

Have the potential to influence SLC6A4 [1]

Role of PTM

Potential impacts

Modified Residue

Asparagine

Modified Location

217

Experimental Method

Co-Immunoprecipitation

Detailed Description

N-linked Glycosylation at SLC6A4 Asparagine 217 has the potential to affect its expression or activity.

Palmitoylation

  Asparticacid

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

  PTM Phenomenon1

Have the potential to influence SLC6A4 [2]

Role of PTM

Potential impacts

Modified Residue

Asparticacid

Studied Phenotype

Huntington's disease [ICD11:8A01.10]

Experimental Method

Co-Immunoprecipitation

Detailed Description

Palmitoylation at SLC6A4 Asparticacid has the potential to affect its expression or activity.

  Unclear Residue

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

  PTM Phenomenon1

. [2]

Role of PTM

Influencing the Disease Progression

Experimental Method

Co-Immunoprecipitation

Detailed Description

Palmitoylation-dependent clustering of PSD-95 has been shown to enhance synaptic localization in Huntington's disease models, suggesting a role in neuronal signaling.

Phosphorylation

  Serine

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

  PTM Phenomenon1

. [3]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

13

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 13 has the potential to affect its expression or activity.

  PTM Phenomenon2

. [3]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

13

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 13 has the potential to affect its expression or activity.

  PTM Phenomenon3

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

40

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 40 has the potential to affect its expression or activity.

  PTM Phenomenon4

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

44

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 44 has the potential to affect its expression or activity.

  PTM Phenomenon5

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

48

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 48 has the potential to affect its expression or activity.

  PTM Phenomenon6

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

52

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 52 has the potential to affect its expression or activity.

  PTM Phenomenon7

Have the potential to influence SLC6A4 [4], [5]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

62

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 62 has the potential to affect its expression or activity.

  PTM Phenomenon8

Have the potential to influence SLC6A4 [6]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

91

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 91 has the potential to affect its expression or activity.

  PTM Phenomenon9

Have the potential to influence SLC6A4 [7]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

149

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 149 has the potential to affect its expression or activity.

  PTM Phenomenon10

. [3]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

277

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 277 has the potential to affect its expression or activity.

  PTM Phenomenon11

. [3]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

277

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 277 has the potential to affect its expression or activity.

  PTM Phenomenon12

Have the potential to influence SLC6A4 [8]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

559

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 559 has the potential to affect its expression or activity.

  PTM Phenomenon13

Have the potential to influence SLC6A4 [7], [9]

Role of PTM

Potential impacts

Modified Residue

Serine

Modified Location

611

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Serine 611 has the potential to affect its expression or activity.

  Threonine

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

  PTM Phenomenon1

Enhancing the activity of SLC6A4 [10]

Role of PTM

On/Off Switch

Affected Drug/Substrate

5-Hydroxytryptamine

Results for Drug

Increasing the transport of 5-Hydroxytryptamine

Modified Residue

Threonine

Modified Location

276

Related Enzyme

cGMP-dependent protein kinase 1 (PRKG1)

Experimental Material(s)

Chinese hamster ovary subclone (CHO-K1) cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 276 have been reported to enhance its transport activity.

  PTM Phenomenon2

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

59

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 59 has the potential to affect its expression or activity.

  PTM Phenomenon3

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

66

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 66 has the potential to affect its expression or activity.

  PTM Phenomenon4

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

67

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 67 has the potential to affect its expression or activity.

  PTM Phenomenon5

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

68

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 68 has the potential to affect its expression or activity.

  PTM Phenomenon6

Have the potential to influence SLC6A4 [4]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

69

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 69 has the potential to affect its expression or activity.

  PTM Phenomenon7

Have the potential to influence SLC6A4 [11]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

81

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 81 has the potential to affect its expression or activity.

  PTM Phenomenon8

. [3]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

603

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 603 has the potential to affect its expression or activity.

  PTM Phenomenon9

. [3]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

603

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 603 has the potential to affect its expression or activity.

  PTM Phenomenon10

Have the potential to influence SLC6A4 [9], [12]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

613

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 613 has the potential to affect its expression or activity.

  PTM Phenomenon11

Have the potential to influence SLC6A4 [1], [9]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

616

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 616 has the potential to affect its expression or activity.

  PTM Phenomenon12

Have the potential to influence SLC6A4 [7]

Role of PTM

Potential impacts

Modified Residue

Threonine

Modified Location

618

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Threonine 618 has the potential to affect its expression or activity.

  Tyrosine

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

  PTM Phenomenon1

Enhancing the stability of SLC6A4 protein and its transport activity [13]

Role of PTM

Protein Stability

Affected Drug/Substrate

5-Hydroxytryptamine

Results for Drug

Increasing uptake of 5-Hydroxytryptamine

Modified Residue

Tyrosine

Experimental Material(s)

Human placental trophoblast cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Phosphorylation at SLC6A4 Tyrosine have been reported to enhance its protein stability and transport activity.

  PTM Phenomenon2

Impairing the function of SLC6A4 [13]

Role of PTM

Surface Expression Modulation

Affected Drug/Substrate

5-Hydroxytryptamine

Results for Drug

Decreasing the transport of 5-Hydroxytryptamine

Modified Residue

Tyrosine

Modified Location

47

Modified State

Tyrosine to Phenylalanine mutation

Experimental Material(s)

Human placental trophoblast cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Removal of the Phosphorylation at SLC6A4 Tyrosine 47 (i.e. Tyrosine to Phenylalanine mutation) have been reported to impaire its transport function.

  PTM Phenomenon3

Impairing the function of SLC6A4 [13]

Role of PTM

Surface Expression Modulation

Affected Drug/Substrate

5-Hydroxytryptamine

Results for Drug

Decreasing the transport of 5-Hydroxytryptamine

Modified Residue

Tyrosine

Modified Location

142

Modified State

Tyrosine to Phenylalanine mutation

Experimental Material(s)

Human placental trophoblast cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Removal of the Phosphorylation at SLC6A4 Tyrosine 142 (i.e. Tyrosine to Phenylalanine mutation) have been reported to impaire its transport function.

Ubiquitination

  Unclear Residue

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

  PTM Phenomenon1

Affecting the SERT expression levels and uptake activity [14]

Role of PTM

Degradation via Proteosome

Related Enzyme

E3 ubiquitin-protein ligase synoviolin (HDR1)

Experimental Material(s)

African green monkey kidney fibroblast-like (COS-7) cells

Experimental Method

Co-Immunoprecipitation

Detailed Description

Ubiquitination at SLC6A4 have been reported to affect its expression levels and uptake activity.
References
1 X-ray structures and mechanism of the human serotonin transporter. Nature. 2016 Apr 21;532(7599):334-9.
2 Bidirectional control of postsynaptic density-95 (PSD-95) clustering by Huntingtin. J Biol Chem. 2014 Feb 7;289(6):3518-28.
3 ActiveDriverDB: human disease mutations and genome variation in post-translational modification sites of proteins. Nucleic Acids Res. 2018;46(D1):D901-D910.
4 Phosphoproteins in extracellular vesicles as candidate markers for breast cancer. Proc Natl Acad Sci U S A. 2017 Mar 21;114(12):3175-3180.
5 Temporal quantitative phosphoproteomics of ADP stimulation reveals novel central nodes in platelet activation and inhibition. Blood. 2017 Jan 12;129(2):e1-e12.
6 Determination of Site-Specific Phosphorylation Ratios in Proteins with Targeted Mass Spectrometry. J Proteome Res. 2018 Apr 6;17(4):1654-1663.
7 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.
8 Toward a comprehensive characterization of a human cancer cell phosphoproteome. J Proteome Res. 2013 Jan 4;12(1):260-71.
9 UniProt: a worldwide hub of protein knowledge. Nucleic Acids Res. 2019 Jan 8;47(D1):D506-D515.
10 Phosphorylation of threonine residue 276 is required for acute regulation of serotonin transporter by cyclic GMP. J Biol Chem. 2007 Apr 20;282(16):11639-47.
11 The N terminus of monoamine transporters is a lever required for the action of amphetamines. J Biol Chem. 2010 Apr 2;285(14):10924-38.
12 Phosphoproteome resource for systems biology research. Methods Mol Biol. 2011;694:307-22.
13 Tyrosine phosphorylation of the human serotonin transporter: a role in the transporter stability and function. Mol Pharmacol. 2012 Jan;81(1):73-85.
14 Role of the E3 ubiquitin ligase HRD1 in the regulation of serotonin transporter function. Biochem Biophys Res Commun. 2021 Jan 1;534:583-589.

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