Phospho-ADD1 (Ser726) Antibody

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Description

Target Overview: ADD1 and Phosphorylation at Ser726

Alpha-adducin (ADD1) is a cytoskeletal protein that caps actin filaments and recruits spectrin to stabilize membrane-cytoskeleton interactions . Phosphorylation at Ser726 occurs in the C-terminal MARCKS domain, regulating ADD1’s actin-capping activity and interaction with signaling molecules like PKC-θ .

Key Features of ADD1 Phosphorylation:

  • Functional Impact: Phosphorylation inhibits actin-capping, enabling dynamic cytoskeletal remodeling during T-cell immune synapse formation .

  • Kinase Involvement: PKC family kinases phosphorylate Ser726, peaking 2–5 minutes post-TCR activation .

  • Biological Relevance: Linked to CD28 costimulation and IL-2 production in CD4+ T cells .

Antibody Development and Validation

Phospho-ADD1 (Ser726) Antibody is a rabbit polyclonal antibody generated using synthetic phosphopeptides (sequence: T-P-S(p)-F-L) conjugated to KLH .

Validation Data:

ParameterDetails
Host SpeciesRabbit
SpecificityDetects endogenous ADD1 only when phosphorylated at Ser726
ApplicationsWB (1:500–1:2000), IHC (1:100–1:300), IF (1:200–1:1000), ELISA
Cross-ReactivityHuman, Mouse, Rat
Storage-20°C in PBS with 50% glycerol; avoid freeze-thaw cycles

Negative Controls: Pre-absorption with immunizing phosphopeptide abolishes signal .

Role in T-Cell Activation

  • CD28 Costimulation: Add1-deficient CD4+ T cells show defective proliferation and CD25 upregulation under suboptimal TCR stimulation, highlighting ADD1’s role in costimulatory signaling .

  • Immune Synapse Dynamics: Phospho-ADD1 localizes peripherally at the immune synapse, colocalizing with F-actin distal to TCR clusters .

  • Kinetic Regulation: Ser726 phosphorylation peaks within minutes of TCR engagement, correlating with PKC-θ activation .

Disease Associations

  • Hypertension: ADD1 polymorphisms are linked to essential hypertension .

  • Cancer: Aberrant ADD1 phosphorylation is observed in breast cancer tissues .

Key Citations

  1. PMC6879651 (2019): First demonstration of ADD1’s role in CD28 costimulation and immune synapse dynamics .

  2. SAB (2025): Technical validation of antibody specificity using peptide inhibition .

  3. Elabscience (2025): Confirmed reactivity in HeLa cells and human breast cancer tissues .

Future Directions

  • Mechanistic Studies: Elucidate how Ser726 phosphorylation modulates spectrin-actin interactions in non-immune cells.

  • Therapeutic Potential: Target ADD1 phosphorylation pathways in autoimmune diseases or cancers with cytoskeletal dysregulation.

Product Specs

Form
Supplied at a concentration of 1.0 mg/mL in phosphate buffered saline (PBS) without magnesium (Mg2+) and calcium (Ca2+), pH 7.4, containing 150mM sodium chloride (NaCl), 0.02% sodium azide, and 50% glycerol.
Lead Time
Typically, we can ship your orders within 1-3 business days after receiving them. Delivery time may vary depending on the purchase method or location. Please consult your local distributors for specific delivery times.
Synonyms
ADD A antibody; ADD1 antibody; ADDA antibody; ADDA_HUMAN antibody; Adducin 1 (alpha) antibody; Alpha adducin antibody; Alpha-adducin antibody; Erythrocyte adducin alpha subunit antibody; Erythrocyte adducin subunit alpha antibody; MGC3339 antibody; MGC44427 antibody; OTTHUMP00000151163 antibody; OTTHUMP00000151164 antibody; OTTHUMP00000151165 antibody; OTTHUMP00000218664 antibody; OTTHUMP00000218665 antibody
Target Names
ADD1
Uniprot No.

Target Background

Function
Alpha-adducin (ADD1) is a membrane-cytoskeleton-associated protein that plays a critical role in promoting the assembly of the spectrin-actin network. It binds to calmodulin, a calcium-binding protein involved in various cellular processes.
Gene References Into Functions
  1. Studies have shown that alpha-adducin single nucleotide polymorphisms (SNPs) are not associated with bone density in lead workers. PMID: 29028685
  2. Research suggests that ADD1 methylation may contribute to the pathogenesis of essential hypertension (EH) with varying implications for both genders. PMID: 28686109
  3. The Gly460Trp gene polymorphism in ADD1 has been found to be significantly and independently associated with the risk of essential hypertension in a Caucasian population from Madeira Island. PMID: 29049185
  4. Overexpression of ZNF322A has been shown to transcriptionally dysregulate genes involved in cell growth and motility, potentially contributing to lung tumorigenesis and poor prognosis. PMID: 26279304
  5. The ADD1 rs4963 polymorphism has been associated with an increased risk of hypertension. PMID: 28040068
  6. Research indicates that the ADD1 G460W polymorphism could be a significant factor in the pathophysiology of tinnitus. PMID: 27340988
  7. Studies have shown that the alpha-adducin G460T polymorphism is associated with essential hypertension. PMID: 27349000
  8. Research suggests that the ADD1-rs4963 polymorphism is associated with an increased risk of colorectal cancer (CRC), implying a potential link between ADD1 and CRC risk. PMID: 25816007
  9. The T allele of ADD1 has been linked to essential hypertension in Asian populations. PMID: 26042478
  10. Research investigating the interaction between DNA methylation of the ADD1 promoter, ADD1 tagSNPs, and environmental factors on essential hypertension (EH) indicates that ADD1 SNP rs4961 plays a protective role in the development of EH. Additionally, interactions between alcohol consumption and DNA methylation of the ADD1 gene promoter significantly influence EH susceptibility. PMID: 25567773
  11. Significant differences in ACE I/D (P<0.05) and AGT M235T (P<0.05) polymorphisms were observed between the control group and pediatric hypertensive group, but no differences were found in ADD Gly460Trp (P>0.05) polymorphism. PMID: 25262176
  12. A significant association was found between the ADD1 gene G614T polymorphism and essential hypertension in Chinese patients. Further studies are needed to validate these findings in larger cohorts. PMID: 24718403
  13. When alpha-adducin forms complexes with sodium potassium ATPase in astrocytes, it triggers non-cell autonomous neurodegeneration. PMID: 25344630
  14. Data suggest that adducin promotes adhesion by regulating desmosomes and is part of a protective pathway in pemphigus. PMID: 24711455
  15. Phosphorylation of ADD1 at Ser12 and Ser355 by cyclin-dependent kinase 1 enables ADD1 to bind to myosin-X (Myo10). PMID: 24379415
  16. Functional polymorphism in the phosphorylation site of ADD1 (rs4963) may influence the susceptibility of non-cardia gastric cancer. PMID: 23985264
  17. In female controls, the concentration of aspartate aminotransferase (AST) was inversely correlated with ADD1 CpG2-5 methylation levels. These observations may provide insights into the pathogenesis of essential hypertension. PMID: 23691048
  18. This meta-analysis is the first to assess the influence of ACE and ADD1 polymorphisms on blood pressure responses to hydrochlorothiazide, aiming to resolve inconsistencies found in previous studies. PMID: 23863317
  19. The rs4963 polymorphism within the ADD1 gene has been linked to essential hypertension in the Chinese population. PMID: 23509723
  20. The role of ADD1 gene polymorphism in hypertension has been investigated. PMID: 22810272
  21. There was no association found between ACE and ADD1 gene polymorphism in ischemic stroke patients. PMID: 23540412
  22. Genotype and allele frequencies of ACE and ADD1 polymorphisms were compared between patients and controls, as well as between ischemic stroke and intracerebral hemorrhage (ICH). PMID: 21194526
  23. A hypertension-linked mutation in alpha-adducin has been shown to increase CFTR (cystic fibrosis transmembrane conductance regulator) surface expression and activity in HEK and cultured rat distal convoluted tubule cells. PMID: 23284854
  24. Variant genotype combinations of ACE and alpha-adducin have been linked to increased vulnerability to recurrent intracerebral hemorrhage in hypertensive patients. PMID: 22198647
  25. Genetic variants of the ADD1 and GNB3 genes may play a role in blood pressure response to the cold pressor test. PMID: 22476228
  26. The organization of a spectrin-like cytoskeleton is associated with keratinocyte differentiation. Cytoskeleton disruption can be mediated by PKCdelta(Thr505) phosphorylation associated with phosphorylated adducin or by a reduction in endogenous adducin. PMID: 22163289
  27. The alpha-adducin Gly460Trp gene polymorphism may modulate renal function decline in the Chinese population. PMID: 22677360
  28. Findings suggest a role for alpha-adducin in memory across species, from nematodes to humans. PMID: 22307086
  29. Data indicate that the alpha-adducin G460W gene polymorphism is linked to essential hypertension (EH) susceptibility. PMID: 22272309
  30. Further studies involving siRNA-mediated knockdowns of spectrin, adducin, or p4.1 have revealed that these proteins are necessary for efficient docking of enterohaemorrhagic Escherichia coli to host cells. PMID: 22197999
  31. Research has investigated the mechanism by which alpha-adducin shuttles between the cytoplasm and nucleus, suggesting a potential role for alpha-adducin in mitosis. PMID: 21736685
  32. In the studied Russian population, the G460W polymorphism of the ADD1 gene can be considered a predisposition gene to hypertension. However, its pathological effect is only manifested under the influence of environmental factors. PMID: 22117679
  33. No association was found between the alpha-adducin G460T and GNB3 C825T polymorphisms and hypertension in Chinese populations. However, marginal significance was observed for C825T, as a putative salt-sensitive switch, in southern Chinese populations. PMID: 21364877
  34. This meta-analysis suggests that the Gly460Trp polymorphism may increase the risk of hypertension in Chinese populations, particularly in Han Chinese. PMID: 21228790
  35. ADD1 variant genotypes were not associated with an increased risk of primary spontaneous intracerebral hemorrhage (PSICH) but, in association with the ACE DD genotype, resulted in significantly higher risk of PSICH. ACE and ADD1 variant genotypes were associated with nonlobar hematoma. PMID: 21339657
  36. These findings indicate novel roles for adducins in the stabilization of epithelial junctions and regulation of junctional remodeling. PMID: 20810786
  37. The alpha-adducin Gly460Trp polymorphism has been associated with hypertension. PMID: 20927398
  38. Genetic variation in alpha-adducin that alters renal function and/or vasoreactivity are logical candidates to explain some of the individual variability in the blood pressure response to exercise. PMID: 20929695
  39. Although the effect of both genetic variants on carotid intima-media thickness (CIMT) was small, this study showed a statistically significant effect of AGTR1 and ADD1 in women. PMID: 19620885
  40. The alpha-adducin gene G460W polymorphism was not associated with hypertension in either a case-control study of essential hypertension in Shanghai residents or in a meta-analysis of all reports in English. PMID: 19960031
  41. ALPHA AND BETA ADDUCIN POLYMORPHISMS AFFECT DECLINE OF RENAL FUNCTION IN HUMAN IGA NEPHROPATHY. PMID: 19838659
  42. The alpha-adducin Gly460Trp polymorphism has been associated with salt-sensitivity. PMID: 20145305
  43. The alpha-adducin G614T polymorphism is associated with the antihypertensive effect of hydrochlorothiazide. PMID: 16266470
  44. Environmental, demographic, and genetic factors, and their interactions, contribute to the systolic blood pressure (SBP) response to antihypertensive drugs, explaining 23% of the total variance. Ethnicity, low sodium intake, and ADD1 614G-->T polymorphism were the only drug-related predictors. PMID: 19779464
  45. The role of the alpha-adducin genotype on renal disease progression has been studied. PMID: 11918733
  46. The interaction between diuretic therapy and the adducin variant on the incidence of myocardial infarction and stroke has been investigated. PMID: 11926892
  47. The ADD1 460W allele has been associated with cardiovascular disease in hypertensive individuals. PMID: 12052841
  48. Blood pressure in patients with primary aldosteronism is influenced by alpha-adducin gene polymorphisms. PMID: 12107246
  49. Carotid and femoral intima-media thickness were assessed in subjects genotyped for the presence of the ACE D, aldosterone synthase -344T, and alpha-adducin 460Trp alleles. PMID: 12172317
  50. Patients homozygous for the allele of that polymorphism had a left ventricular mass index significantly higher compared with heterozygotes or homozygotes. These subjects also have significantly lower plasma renin activity. PMID: 12195118

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Database Links

HGNC: 243

OMIM: 102680

KEGG: hsa:118

STRING: 9606.ENSP00000264758

UniGene: Hs.183706

Protein Families
Aldolase class II family, Adducin subfamily
Subcellular Location
Cytoplasm, cytoskeleton. Cell membrane; Peripheral membrane protein; Cytoplasmic side.
Tissue Specificity
Expressed in all tissues. Found in much higher levels in reticulocytes than the beta subunit.

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