Nuclear export signal¶
A short sequence or structural motif on a macromolecule that recruits nuclear-export machinery and biases transport from the nucleus to the cytoplasm.
Core Idea¶
Classical protein NES motifs expose hydrophobic residues recognized by exportins such as CRM1, which couple cargo binding to Ran-GTP-dependent passage through nuclear pores. Cargo presents an accessible recognition motif, export receptor and Ran state assemble a transport complex, the nuclear pore permits transit, and compartment-specific GTP hydrolysis releases cargo directionally. The abstraction is therefore identified by a declared carrier, a transformation or constraint over that carrier, and an invariant that tells an analyst whether the named structure is genuinely present.
Scope of Application¶
Nuclear export signal belongs to cellular transport and is useful where the analyst can specify the typed cellular transport carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets, then evaluate a typed cargo contains an accessible export-recognition feature whose receptor-dependent transport measurably increases nuclear-to-cytoplasmic localization under the declared cellular context. The scope is broad within that domain but bounded by the need for a typed cargo contains an accessible export-recognition feature whose receptor-dependent transport measurably increases nuclear-to-cytoplasmic localization under the declared cellular context. High-level cell-biological identity only; no sequence engineering, wet-laboratory, clinical, or pathogen-modification procedure is provided.
Clarity¶
The abstraction clarifies a crowded vocabulary by making a typed cargo contains an accessible export-recognition feature whose receptor-dependent transport measurably increases nuclear-to-cytoplasmic localization under the declared cellular context the center of the account. A claim should name the carrier, the governing operation or relation, the applicable assumptions, and the recognition test. A bare label is insufficient because the name Nuclear export signal can be used for a formal identity, an implementation, or a neighboring result unless carrier and convention are stated.
Manages Complexity¶
Without the abstraction, an analyst must reason directly over many local details: the carrier roles, admissibility assumptions, competing conventions, derived invariants, boundary cases, and proof or validation obligations specific to Nuclear export signal. Nuclear export signal compresses them into the roles in the structural signature. That compression permits comparison across instances without erasing the variables that determine validity. It also exposes which details may be varied safely and which are constitutive.
Abstract Reasoning¶
- Identify the carrier. State what the elements, states, objects, or observations are: the typed cellular transport carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets. Reject examples whose alleged carrier belongs to a different problem.
- Lock the constitutive rule. Express a typed cargo contains an accessible export-recognition feature whose receptor-dependent transport measurably increases nuclear-to-cytoplasmic localization under the declared cellular context independently of one notation or implementation.
Knowledge Transfer¶
Knowledge transfers strongly among subfields of cellular transport because they reuse the typed cellular transport carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets, Cargo presents an accessible recognition motif, export receptor and Ran state assemble a transport complex, the nuclear pore permits transit, and compartment-specific GTP hydrolysis releases cargo directionally., and type the carrier, state every parameter and convention in the definition, test that a typed cargo contains an accessible export-recognition feature whose receptor-dependent transport measurably increases nuclear-to-cytoplasmic localization under the declared cellular context, compare the nearest accepted identity, and report counterexamples, uncertainty, and limiting cases.
Relationships to Other Abstractions¶
Current abstraction Nuclear export signal Domain-specific
Parents (1) — outgoing typed relations
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Nuclear export signal is a kind of Selective Propagation Prime
What makes it its own entry: the domain-specific identity determined by a typed cargo contains an accessible export-recognition feature whose receptor-dependent transport measurably increases nuclear-to-cytoplasmic localization under the declared cellular context.
Hierarchy path (1) — routes to 1 parentless root
- Nuclear export signal → is a kind of Selective Propagation → is a kind of Propagation
Neighborhood in Abstraction Space¶
Nuclear export signal sits in a moderately populated region (47th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.
Family — Molecular & Cellular Biology Mechanisms (16 abstractions)
Nearest neighbors
- RAN translation — 0.88
- Post-transcriptional modification — 0.87
- Regulation of gene expression — 0.86
- Contact order — 0.86
- Quorum sensing — 0.85
Computed from structural-signature embeddings · 2026-10-25