DDB1 Antibody [M17E15] | Primary Antibodies

Application: Reactivity: Human, Mouse, Rat, Monkey

Lane 1: Hela, Lane 2: 3T3, Lane 3: PC-12, Lane 4: COS-7

Usage Information

Dilution
WB1:1000

Application
WB

Reactivity
Human, Mouse, Rat, Monkey

Source
Rabbit Monoclonal Antibody

Storage Buffer
PBS, pH 7.2+50% Glycerol+0.05% BSA+0.01% NaN3

Storage (from the date of receipt)
-20°C (avoid freeze-thaw cycles), 2 years

Predicted MW
127 kDa

Datasheet & SDS

Biological Description

Specificity
DDB1 Antibody [M17E15] detects endogenous levels of total DDB1 protein.

Clone
M17E15

Synonym(s)
DNA damage-binding protein 1; DDB p127 subunit; DNA damage-binding protein a (DDBa); XAP-1; UV-DDB 1; XPE-binding factor (XPE-BF); Xeroderma pigmentosum group E-complementing protein (XPCe); DDB1; XAP1

Background
DDB1 (damage-specific DNA binding protein 1), the scaffold subunit of the CRL4 ubiquitin E3 ligase family, orchestrates nucleotide excision repair initiation, histone eviction, and cell cycle checkpoint enforcement by recruiting diverse substrate receptors to damaged chromatin sites. Its propeller blade architecture with a central β-sheet core accommodates the DDB2 WD40 domain for lesion-specific recognition of cyclobutane pyrimidine dimers and 6-4 photoproducts, while the lateral surface docks CUL4A-ROC1 to catalyze K48/K63-linked polyubiquitination of repair factors like XPC, DDB2 itself, and histones H3/H4. Upon UV exposure, DDB1 translocates from soluble to tightly chromatin-bound fractions in a DDB2-dependent manner, facilitating ubiquitination-mediated displacement of core histones to expose lesions for XPC loading and TFIIH recruitment; this histone code handover licenses dual incision while preventing error-prone repair. DDB1 scaffolds additional DCAFs like VprBP for HIV integration and CDT1 for replication licensing, integrating DNA damage with G1/S transition via p21/p27 degradation. DDB1 maintains genomic stability across proliferating tissues, with acute depletion triggering p53-dependent apoptosis in neural progenitors and hematopoietic stem cells through unresolved replication stress. Mutations underlie xeroderma pigmentosum E through defective UV-DDB assembly, while CUL4-DDB1 overexpression drives tumorigenesis via CDT1 hyperdegradation and replication origin firing.

Background

DDB1 (damage-specific DNA binding protein 1), the scaffold subunit of the CRL4 ubiquitin E3 ligase family, orchestrates nucleotide excision repair initiation, histone eviction, and cell cycle checkpoint enforcement by recruiting diverse substrate receptors to damaged chromatin sites. Its propeller blade architecture with a central β-sheet core accommodates the DDB2 WD40 domain for lesion-specific recognition of cyclobutane pyrimidine dimers and 6-4 photoproducts, while the lateral surface docks CUL4A-ROC1 to catalyze K48/K63-linked polyubiquitination of repair factors like XPC, DDB2 itself, and histones H3/H4. Upon UV exposure, DDB1 translocates from soluble to tightly chromatin-bound fractions in a DDB2-dependent manner, facilitating ubiquitination-mediated displacement of core histones to expose lesions for XPC loading and TFIIH recruitment; this histone code handover licenses dual incision while preventing error-prone repair. DDB1 scaffolds additional DCAFs like VprBP for HIV integration and CDT1 for replication licensing, integrating DNA damage with G1/S transition via p21/p27 degradation. DDB1 maintains genomic stability across proliferating tissues, with acute depletion triggering p53-dependent apoptosis in neural progenitors and hematopoietic stem cells through unresolved replication stress. Mutations underlie xeroderma pigmentosum E through defective UV-DDB assembly, while CUL4-DDB1 overexpression drives tumorigenesis via CDT1 hyperdegradation and replication origin firing.

References
https://pubmed.ncbi.nlm.nih.gov/16951172/ https://pubmed.ncbi.nlm.nih.gov/19481525/

Reference Table for Selecting PVDF Membrane Pore Size Specifications

Protein Size (kDa)	PVDF Transfer Membrane Pore Size (μm)
< 10	0.22
10-20	0.22
20-30	0.45
30-45	0.45
45-70	0.45
80-100	0.45
100-140	0.45
> 140	0.45

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Protein Size (kDa)	Separating Gel Percentage
4-40	20%
12-45	15%
10-70	12.5%
15-100	10%
25-100	8%
60-210	5%