Design a Western Blot for TREX1

Band shift · Use the separately labelled calculated mass and catalog-observed evidence above. A sequence annotation does not establish an observed migration shift. Verify target identity with orthogonal controls.

Isoforms · Three isoforms are listed. Isoform 2 lacks residues 1–10, while isoform 1 has an alternative N-terminal sequence. These differences may affect migration or antibody recognition; check which isoform the antibody detects before assigning bands.

PTM · UniProt lists phosphoserine at positions 78, 167, and 261 in its sequence coordinate convention. Confirm how an antibody or paper numbers its sites before comparing results. These annotations alone do not establish a visible band shift.

TREX1 has three annotated phosphoserines. If using a phospho-specific antibody, compare blocking conditions for background and target signal, then use the chosen condition consistently across samples. The supplied features do not identify a preferred blocker.

Induction · No general induction response is established by this guide. A pathway or gene-set association is not evidence of induction in a particular specimen. Verify the relevant treatment and control in a target-specific experiment.

Transfer · Standard workflow guidance: verify transfer efficiency for the intended target size before interpreting a weak signal. Use total-protein assessment and optimize transfer for the membrane, gel and apparatus; the labelled catalog values take precedence.

Blocking · Standard workflow guidance: follow the A00940 datasheet where specified. Otherwise compare 5% milk or 5% BSA in TBST; for a phospho-specific assay start with BSA. Optimize background and specific signal with matched controls.

Quantitation · Quantify the same verified band or defined set of bands in every lane, within the assay's linear range. Keep fraction preparation consistent because TREX1 is reported in multiple compartments. If isoforms resolve separately, state which bands were included.

Interpretation · The reported apparent band is 68 kDa, versus a predicted mass of 33.2 kDa. TREX1 is annotated as a homodimer by similarity, but that annotation alone cannot identify the 68 kDa band. Compare reducing and denaturing conditions and verify the band's identity before assigning a cause.

TREX1 is reported in the nucleus, cytosol, and at the endoplasmic reticulum membrane; its C-terminal region is associated with cytoplasmic retention. Choose a lysate or fraction that captures the compartment being studied, and compare like fractions across samples.

No. TREX1 is annotated as a homodimer by similarity, and 68 kDa is near twice its predicted 33.2 kDa mass, but neither fact proves that the observed band is a dimer. Verify its identity and assess whether it persists under denaturing conditions.

First consider the three annotated isoforms and whether the antibody recognizes their different N termini. Compare band patterns across relevant cell fractions, since TREX1 has nuclear, cytosolic, and endoplasmic reticulum membrane locations. Phosphorylation sites are annotated, but their presence alone cannot explain an unexpected band.