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  • ABC124 - Anti-phospho-ULK1 (Ser555) Antibody

ABC124 Sigma-Aldrich

Anti-phospho-ULK1 (Ser555) Antibody

clone, from rabbit, purified by affinity chromatography

Synonym: Serine/threonine-protein kinase ULK1, Autophagy-related protein 1 homolog, ATG1, hATG1, Unc-51-like kinase 1

  •  eCl@ss 32160702

  •  NACRES NA.41



Related Categories Alphabetical Index, Antibodies, Primary Antibodies, UH-UZ
clone   polyclonal
biological source   rabbit
application(s)   inhibition assay: suitable (peptide)
  western blot: suitable
species reactivity   rat, mouse, human, Xenopus, bovine, human
species reactivity (predicted by homology)   mouse (based on 100% sequence homology), Xenopus (based on 100% sequence homology), bovine (based on 100% sequence homology), rat (based on 100% sequence homology)
shipped in   wet ice
Quality Level   100
antibody product type   primary antibodies
purified by   affinity chromatography
NCBI accession no.   NP_003556
UniProt accession no.   O75385


General description

ULK1 or autophagy-related protein 1 homolog (ATG1) is a serine/threonine protein kinase. It is a ubiquitously expressed protein that is highly abundant in the brain, skeletal muscle, and heart. It is involved in the signaling pathway of mTOR receptors leading to the regulation of autophagy in nutrient-deprived cells. mTOR may interact with ULK1 as a complex of ULK1/FIP200/Atg13. ULK1 may play an important role in neuronal development: Elimination of ULK1′s enzymatic activity by targeted disruption of its kinase domain has blocked the outgrowth of neurons in the developing mouse brain, possibly by blocking the ULK1-mediated trafficking of neurotrophins.


This antibody recognizes ULK1 phosphorylated at Ser555.


Epitope: Phosphorylated Ser555

KLH-conjugated linear peptide corresponding to human ULK1 phosphorylated at Ser555.


Peptide Inhibition Analysis: A representative lot of this antibody blocked ULK1 in PIA involving peptide 3123-C vs. peptide 3123 on serum starved MCF7 cell lysates.

Research Category
Apoptosis & Cancer

Research Sub Category
Kinases & Phosphatases

This Anti-phospho-ULK1 (Ser555) Antibody is validated for use in Western Blotting, Peptide Inhibition Assay for the detection of phospho-ULK1 (Ser555).

Target description

~120 kDa observed. Uniprot describes a molecular weight at 112 kDa This protein has been observed at greater than ~125 kDa due to multiple phosphorylation-dephosphorylation processes. (Ganley, I. G., et al. (2009). J Biol Chem. 284(18):12297-12305.)

Physical form

Affinity Purfied

Purified rabbit polyclonal in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.


Evaluated by Western Blot in non-serum starved and serum starved MCF7 cell lysates.

Western Blot Analysis: 0.2 µg/mL of this antibody detected phospho-ULK1 (Ser555) in 10 µg of non-serum starved and serum starved MCF7 cell lysates.

Analysis Note

Non-serum starved and serum starved MCF7 cell lysates

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Safety & Documentation

Safety Information

WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles


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Western Blot Protocol | Immunoblotting Protocol

Western Blotting refers to the electrophoretic transfer of proteins from sodium dodecyl sulfate polyacrylamide gels to sheets of PVDF or nitrocellullose membrane, followed by immunodetection of prote...
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