Anti-LINE-1 ORF1p Antibody, clone 4H1

clone 4H1, from mouse

LINE-1 retrotransposable element ORF1 protein, L1ORF1p, LINE retrotransposable element 1, LINE1 retrotransposable element 1

Quality Level

biological source


antibody product type

primary antibodies


4H1, monoclonal

species reactivity



immunocytochemistry: suitable
immunohistochemistry: suitable (paraffin)
immunoprecipitation (IP): suitable
western blot: suitable



UniProt accession no.

General description

LINE-1 retrotransposable element ORF1 protein (UniProt: Q9UN81; also known L1ORF1p, LINE retrotransposable element 1, LINE1 retrotransposable element 1) is encoded by the LIRE1 (also known as LRE1) gene in human. LINE1-ORF 1P belongs to the transposase 22 family. It is mainly cytoplasmic protein and is enriched in stress granules, but may rarely be detected in the nucleolus. It contains a coiled coil domain that mediates its homotrimerization. The RNA recognition motif (RRM) the C-terminal domain are required for its proper RNA-binding activity. LINE1-ORF 1P is a nucleic acid-binding protein which is essential for retrotransposition of LINE-1 elements in the genome. It is also reported to function as a nucleic acid chaperone binding its own transcript and therefore preferentially mobilizing the transcript from which they are encoded. Retrotransposition is a shown to be a complex process that involves transcription of the LINE1, transport of its RNA to the cytoplasm, translation of the bicistronic RNA, formation of a ribonucleoprotein particle, its re-import to the nucleus and then target-primed reverse transcription at the integration site. Somatic LINE1 insertions are rare in most tissues, but are found in brain, testis, and many cancer types and have been implicated in carcinogenesis. Its expression is consistently detected in p53 mutant tumors, but, little or no expression is detected in Wilms tumors that were normal for p53. (Ref.: Goodier, JL et al. (2013). Nucleic Acids Res. 41(15): 7401-7419).


Clone 4H1 specifically detects LINE-1 ORF1 protein in MCF7 cells. This clone targets the sequence corresponding to 10 amino acids from the N-terminal region of LINE-1 ORF1p.


A linear peptide corresponding to 10 amino aicds from the N-terminal region of human LINE-1 ORF1 protein.


Immunohistochemistry Analysis: A representative lot detected LINE-1 ORF1p in Immunohistochemistry applications (Rodic, N., et. al. (2014). AM J Pathol. 184(5):1280-6; Doucet-O′Hare, T.T., et. al. (2015). Proc Natl Acad Sci USA. 112(35):E4894-900; Wylie, A., et. al. (2016). Genes Dev. 30(1):64-77).

Immunocytochemistry Analysis: A representative lot detected LINE-1 ORF1p in Immunocytochemistry applications (Taylor, M.S., et. al. (2013). Cell 155(5):1034-48).

Immunoprecipitation Analysis: A representative lot detected LINE-1 ORF1p in Immunoprecipitation applications (Taylor, M.S., et. al. (2013). Cell 155(5):1034-48).

Western Blotting Analysis: A representative lot detected LINE-1 ORF1p in Western Blotting applications (Taylor, M.S., et. al. (2013). Cell 155(5):1034-48).
Research Category
Apoptosis & Cancer
Detect LINE-1 retrotransposable element ORF1 protein using this mouse monoclonal Anti-LINE-1 ORF1p Anibody, clone 4H1, Cat. No. MABC1152. It is used in Immunocytochemistry, Immunohistochemistry (Paraffin), Immunoprecipitation, and Western Blotting.


Evaluated by Western Blotting in MCF7 cell lysate.

Western Blotting Analysis: A 1:1,000 dilution of this antibody detected LINE-1 ORF1p in 10 µg of MCF7 cell lysate.

Target description

~42 kDa observed; 40.06 kDa calculated. Uncharacterized bands may be observed in some lysate(s).

Physical form

Protein G purified
Purified mouse monoclonal antibody IgG1 in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.
Format: Purified

Storage and Stability

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

Other Notes

Concentration: Please refer to lot specific datasheet.


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.

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Many Different LINE-1 Retroelements Are Activated in Bladder Cancer.
Whongsiri, et al.
International Journal of Molecular Sciences, 21 (2021)
John L Goodier et al.
Acta neuropathologica communications, 8(1), 110-110 (2020-07-18)
A pathogenic GGGCCC hexanucleotide expansion in the first intron/promoter region of the C9orf72 gene is the most common mutation associated with amyotrophic lateral sclerosis (ALS). The C9orf72 gene product forms a complex with SMCR8 (Smith-Magenis Syndrome Chromosome Region, Candidate 8)...
Adam Idica et al.
The Journal of biological chemistry, 292(50), 20494-20508 (2017-10-05)
Repetitive elements, including LINE-1 (L1), comprise approximately half of the human genome. These elements can potentially destabilize the genome by initiating their own replication and reintegration into new sites (retrotransposition). In somatic cells, transcription of L1 elements is repressed by...
Daniel Ardeljan et al.
Clinical chemistry, 63(4), 816-822 (2017-02-12)
A large portion of intronic and intergenic space in our genome consists of repeated sequences. One of the most prevalent is the long interspersed element-1 (LINE-1, L1) mobile DNA. LINE-1 is rightly receiving increasing interest as a cancer biomarker. Intact...
Erica M Briggs et al.
Mobile DNA, 10, 51-51 (2020-01-01)
We previously examined expression of Long Interspersed Element-1 (LINE-1) in a variety of prostate cancer cells including hormone-dependent LNCaP cells. These studies demonstrated expression and sub-cellular localization of LINE-1 proteins, ORF1p, with antibody 4H1, and ORF2p, with antibody chA1-L1. Here...




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