Product: Phospho-ULK1 (Ser556) Antibody
Catalog: DF7587
Source: Rabbit
Application: WB, IHC, ELISA(peptide)
Reactivity: Human, Mouse, Rat
Prediction: Pig, Bovine, Horse, Sheep, Rabbit, Dog, Chicken, Xenopus
Mol.Wt.: 120 kD; 113kD(Calculated).
Uniprot: O75385
RRID: AB_2841078

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 100ul $280 In stock
 200ul $350 In stock

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Product Info

WB 1:1000-3000, IHC 1:200, ELISA(peptide) 1:20000-1:40000
*The optimal dilutions should be determined by the end user.
Pig(100%), Bovine(90%), Horse(100%), Sheep(100%), Rabbit(90%), Dog(90%), Chicken(90%), Xenopus(80%)
Phospho-ULK1 (Ser556) Antibody detects endogenous levels of ULK1 only when phosphorylated at S556.
Cite Format: Affinity Biosciences Cat# DF7587, RRID:AB_2841078.
The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


ATG 1; ATG1; ATG1 autophagy related 1 homolog; ATG1A; Autophagy related protein 1 homolog; Autophagy-related protein 1 homolog; FLJ38455; FLJ46475; hATG1; KIAA0722; Serine/threonine protein kinase ULK1; Serine/threonine protein kinase Unc51.1; Serine/threonine-protein kinase ULK1; ULK 1; ULK1; ULK1_HUMAN; Unc 51 (C. elegans) like kinase 1; UNC 51; Unc 51 like kinase 1; Unc-51 like kinase 1 (C. elegans); Unc-51-like kinase 1; UNC51; UNC51, C. elegans, homolog of; Unc51.1;


O75385 ULK1_HUMAN:

Ubiquitously expressed. Detected in the following adult tissues: skeletal muscle, heart, pancreas, brain, placenta, liver, kidney, and lung.




Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

PTMs - O75385 As Substrate

Site PTM Type Enzyme
K13 Ubiquitination
K46 Ubiquitination
K55 Ubiquitination
K62 Ubiquitination
S111 Phosphorylation
S131 Phosphorylation
K140 Ubiquitination
S158 Phosphorylation
K162 Acetylation
K162 Ubiquitination
T180 Phosphorylation O75385 (ULK1)
S225 Phosphorylation
K235 Ubiquitination
K237 Ubiquitination
S281 Phosphorylation
S317 Phosphorylation Q13131 (PRKAA1) , P54646 (PRKAA2)
S330 Phosphorylation
S403 Phosphorylation
S405 Phosphorylation
S409 Phosphorylation
S415 Phosphorylation
S429 Phosphorylation
S450 Phosphorylation
T456 Phosphorylation
S459 Phosphorylation
S460 Phosphorylation
S465 Phosphorylation
S467 Phosphorylation
T468 Phosphorylation
S469 Phosphorylation
S477 Phosphorylation
S479 Phosphorylation
S495 Phosphorylation
S522 Phosphorylation
R529 Methylation
S533 Phosphorylation
S538 Phosphorylation
S539 Phosphorylation
S544 Phosphorylation
S556 Phosphorylation P54646 (PRKAA2)
S561 Phosphorylation
T575 Phosphorylation
S583 Phosphorylation
S588 Phosphorylation
S593 Phosphorylation
S598 Phosphorylation
S605 Phosphorylation
K607 Acetylation
S623 Phosphorylation
T625 Phosphorylation
S630 Phosphorylation
T636 Phosphorylation
S638 Phosphorylation P42345 (MTOR) , P54646 (PRKAA2) , Q13131 (PRKAA1)
S639 Phosphorylation
T654 Phosphorylation
T660 Phosphorylation
S665 Phosphorylation
S694 Phosphorylation
T695 Phosphorylation
T699 Phosphorylation
T709 Phosphorylation
S716 Phosphorylation
T717 Phosphorylation
S719 Phosphorylation
S748 Phosphorylation
S758 Phosphorylation P42345 (MTOR)
S761 Phosphorylation
T764 Phosphorylation
S775 Phosphorylation
S781 Phosphorylation
S949 Phosphorylation
S954 Phosphorylation
S1042 Phosphorylation
T1046 Phosphorylation

PTMs - O75385 As Enzyme

Substrate Site Source
A2RUS2 (DENND3) S472 Uniprot
A2RUS2 (DENND3) S490 Uniprot
O00560 (SDCBP) S6 Uniprot
O75143 (ATG13) S355 Uniprot
O75385 (ULK1) T180 Uniprot
Q13131 (PRKAA1) S360 Uniprot
Q13131 (PRKAA1) T368 Uniprot
Q13131 (PRKAA1) S397 Uniprot
Q13131 (PRKAA1) S486 Uniprot
Q13131 (PRKAA1) T488 Uniprot
Q7Z3C6 (ATG9A) S761 Uniprot
Q86WV6 (TMEM173) S366 Uniprot
Q8N122 (RPTOR) S792 Uniprot
Q8N122 (RPTOR) S855 Uniprot
Q8N122 (RPTOR) S859 Uniprot

Research Backgrounds


Serine/threonine-protein kinase involved in autophagy in response to starvation. Acts upstream of phosphatidylinositol 3-kinase PIK3C3 to regulate the formation of autophagophores, the precursors of autophagosomes. Part of regulatory feedback loops in autophagy: acts both as a downstream effector and negative regulator of mammalian target of rapamycin complex 1 (mTORC1) via interaction with RPTOR. Activated via phosphorylation by AMPK and also acts as a regulator of AMPK by mediating phosphorylation of AMPK subunits PRKAA1, PRKAB2 and PRKAG1, leading to negatively regulate AMPK activity. May phosphorylate ATG13/KIAA0652 and RPTOR; however such data need additional evidences. Plays a role early in neuronal differentiation and is required for granule cell axon formation. May also phosphorylate SESN2 and SQSTM1 to regulate autophagy.


Autophosphorylated. Phosphorylated under nutrient-rich conditions; dephosphorylated during starvation or following treatment with rapamycin. Under nutrient sufficiency, phosphorylated by MTOR/mTOR, disrupting the interaction with AMPK and preventing activation of ULK1 (By similarity). In response to nutrient limitation, phosphorylated and activated by AMPK, leading to activate autophagy.

Acetylated by KAT5/TIP60 under autophagy induction, promoting protein kinase activity.

Subcellular Location:

Cytoplasm>Cytosol. Preautophagosomal structure.
Note: Under starvation conditions, is localized to puncate structures primarily representing the isolation membrane that sequesters a portion of the cytoplasm resulting in the formation of an autophagosome.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Ubiquitously expressed. Detected in the following adult tissues: skeletal muscle, heart, pancreas, brain, placenta, liver, kidney, and lung.

Subunit Structure:

Interacts with GABARAP and GABARAPL2. Interacts (via C-terminus) with ATG13. Part of a complex consisting of ATG13, ATG101, ULK1 and RB1CC1. Associates with the mammalian target of rapamycin complex 1 (mTORC1) through an interaction with RPTOR; the association depends on nutrient conditions and is reduced during starvation. Interacts with FEZ1; SCOC interferes with FEZ1-binding. Interacts with TBC1D14. Interacts (phosphorylated form) with TRIM5. When phosphorylated at Ser-317, interacts with MEFV and BECN1 simultaneously. Interacts with TRIM21 and IRF3, in the presence of TRIM21. Interacts with SESN2. Interacts with SQSTM1. Interacts with C9orf72. Interacts with WDR45.


Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. APG1/unc-51/ULK1 subfamily.

Research Fields

· Cellular Processes > Transport and catabolism > Autophagy - animal.   (View pathway)

· Environmental Information Processing > Signal transduction > mTOR signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > AMPK signaling pathway.   (View pathway)

· Organismal Systems > Aging > Longevity regulating pathway.   (View pathway)

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