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Cell line: | HEK293T-HELZ-null |
DSMZ no.: | ACC 875 |
Species: | human (Homo sapiens) |
Cell type: | embryonal kidney |
Origin: | this cell line is part of a set of cell lines carrying mutations in different genes affecting mRNA processing and translation efficiency (ACC 872 - ACC 876).
Single clone derivative of 293T (DSMZ ACC 635) which was modified by CRISPR/CAS9 editing.
In this cell line the ORFs of both alleles of the HELZ gene was disrupted by an insertion in exon 8. The HELZ (Helicase with Zinc-finger) protein is interacting with the CCR-NOT transcription complex promoting decapping of mRNAs and their decay. |
Reference(s): | 18207, 18216 |
Biosafety level: | 1, GMO-S1 |
Risk assessment: | genetically modified organism, according to German and European legislation allocated into group S1
(see also parental 293T, DSMZ ACC ACC 635) |
Permissions and restrictions: | A, D |
Depositor-specific restrictions: | Transfer to third parties needs to be negotiated with the depositor. |
| DSMZ Cell Culture Data: |
Morphology: | fibroblastoid cells growing adherently as monolayer; image; image |
Medium: | 90% DMEM + 10% h.i. FBS + 2mM L.-glutamine |
Subculture: | seed out at about 0.5-1 x 106 cells/80cm2; split confluent culture 1:3 to 1:10 every 2-3 days by tapping the flask (trypsin/EDTA is not necessary) |
Incubation: | at 37 °C with 5-10% CO2 |
Doubling time: | ca. 24-30 hours |
Harvest: | cell harvest of ca. 4-10 x 106 cells/80 cm2 flask |
Storage: | frozen with 70% medium, 20% FBS, 10% DMSO |
| DSMZ Scientific Data: |
Mycoplasma: | negative in PCR assay |
Immunology: | to inquire about expression of EpCAM and intermediate filaments, contact ulfert.rand@dsmz.de. |
Authenticity: | STR analysis according to the global standard ANSI/ATCC ASN-0002.1-2021 (2021) resulted in an authentic STR profile of the reference STR database. |
Molec. Genetics: | disruption of the HELZ gene was verified by sequence analysis as described in Ref 18207. For internal control the following primers can be used:
D-HELZ-F: GGTGTTATGAAGAGGAGAGTAAAGTGA,
D-HELZ-R: TGTACTAGCTTAGGACAGAGAGAGAAG. Absence of the HELZ protein was confirmed by Western blot. |
Viruses: | PCR: EBV -, HBV -, HCV -, HIV-1 -, HIV-2 -, HTLV-1/2 -, MLV - |
Supplied as: | Delivery form | | Prices | | Frozen culture | | 450,- € | Growing culture (please inquire for exact delivery time) | | 900,- € | DNA isolated from cell line (25 µg) | | 560,- € | DNA isolated from cell line (5 µg) | | 140,- € | see price list |
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