Telomerase, Control Peptide (EST2, hEST2, TCS1, Telomerase Catalytic Subunit, Telomerase-associated protein 2, Telomere Reverse Transcriptase, TERT, TP2, TRT)

Control Peptide for T2399-85 and T2399-90\n\nA 23aa Peptide sequence mapping near the N-terminus of yeast telomerase/Est2. The 23 AA yeast control peptide has no significant sequence homology with mammalian telomerases.\n\nThe 3'ends of chromosomes are capped with telomere sequences (TTAGGG; 6-26 nucleotides in length) by ribonucleoprotein telomerase during DNA replication. Telomerase is an unusual RNA-dependent DNA polymerase that uses and RNA component to specify the addition of telomere. The telomeric RNA contains a sequence complementary to TTAGGG. In ciliated protozoa and yeast, telomere length is maintained by regulating the activity of telomerase. Many mammalian cells do not express telomerase resulting into shortening of telomere with each cell division, and ultimately causing the chromosomal instability, aging and cell death. Approx. 4.8 kb of telomeric DNA is lost with each cell division resulting into large number of chromosomal abnormalities. Most recently, introduction of telomerase into normal human cells has been shown to extend normal cell life by ~ 20 doubling. (2).\n\nPurification of telomerase from the ciliate also revealed two protein of 43 and 123kD. p123 is a homolog of yeast Est2 (Essential for Telomerase activity). Mammalian homologs of yeast Est2 (also known as TP2 for Telomerase associated Protein 2; hEST2 or telomerase catalytic subunit or telomerase reverse transcriptase, TERT) have also been cloned (human Est2, 1132 aa; mouse Est2 1122 aa; ~127kD). hEST2 was localized in the nucleus. Yeast telomerase is 988 aa protein.

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SPECIFICATIONS

Catalog Number

T2399-80

Size

50ug

Applications

ELISA, WB

Form

Supplied as a liquid in PBS, pH 7.2

Purity

Highly purified

References

1. Nakamura Tm et al (1997) Science 277, 955-959; 2. Meyerson M et al (1997) Cell 90, 785-795; Greenberg RA et al (1998) Oncogene in press; Nugent CI et al (1998) Genes Develop. 12, 1073-85 (review).