|Positive WB detected in||A431 cells, HeLa cells|
|Positive IHC detected in||human breast cancer tissue|
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
|Western Blot (WB)||WB : 1:1000-1:4000|
|Immunohistochemistry (IHC)||IHC : 1:50-1:500|
|Sample-dependent, check data in validation data gallery|
28657-1-AP targets ATF4 in WB, IHC, ELISA applications and shows reactivity with Human samples.
|Cited Reactivity||human, mouse|
|Host / Isotype||Rabbit / IgG|
|Immunogen||ATF4 fusion protein Ag29844|
|Full Name||activating transcription factor 4 (tax-responsive enhancer element B67)|
|Calculated molecular weight||39 kDa|
|Observed molecular weight||45-50 kDa|
|GenBank accession number||BC022088|
|Gene ID (NCBI)||468|
|Purification Method||Antigen affinity purification|
|Storage Buffer||PBS with 0.02% sodium azide and 50% glycerol pH 7.3.|
|Storage Conditions||Store at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.|
ATF4 is a transcription factor, that accumulates predominantly in osteoblasts, where it regulates terminal osteoblast differentiation and bone formation[PMID: 19016586]. As a basic leucine-zipper (bZip) transcription factor, ATF4 can regulate amino acid metabolism, cellular redox state, and anti-stress responses. It also regulates age-related and diet-induced obesity and glucose homeostasis in mammals, and has conserved metabolic functions in flies[PMID: 19726872]. Due to its location at chromosome 22q13, a region linked to schizophrenia, ATF4 is considered as a positional candidate gene for schizophrenia[PMID: 18163433]. Otherwise, since ATF4 is induced by tumour microenvironmental factors, and regulates processes relevant to cancer progression, it might serve as a potential therapeutic target in cancer. Endogenous ATF4 protein has a molecular mass of 50kd. [PMID: 17726049]. ATF4 can bind DNA as a homodimer and as a heterodimer. ATF4 is ubiquitinated by SCF(BTRC) in response to mTORC1 signal, followed by proteasomal degradation and leading to down-regulate expression of SIRT4, so the molecular weight of ATF4 may be 70 kDa.
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