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Calpain: Clinical significance, Function & Discovery

A calpain (/ˈkælpeɪn/; EC 3.4.22.52, EC 3.4.22.53) is a protein belonging to the family of calcium-dependent, non-lysosomal cysteine proteases (proteolytic enzymes) expressed ubiquitously in mammals and many other organisms. Calpains constitute the C2 family of protease clan CA in the MEROPS database. The calpain proteolytic system includes the calpain…

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Calpain topic overview

The analysis highlights Clinical significance, Function and Discovery as prominent areas in the source structure around Calpain.

Related topics
79
Source areas
6
Connected nodes
85
Extracted relationships
104
Concept neighborhoods
30
Bridge connections
85

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Clinical significance · 22 topics
Function · 19 topics
Discovery · 15 topics
Cleavage specificity · 13 topics
Overview · 8 topics
Extended family · 2 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

AlphaFold
IPR001300 · PF00648
Available protein structures:
IPR001300 · PF00648
InterPro
IPR001300
MEROPS
C2
PDB
1tl9​ A:55-354; 1kxr​ B:55-354; 1tlo​ A:55-354; 2ary​ B:55-354; 1zcm​ A:55-353; 1mdw​ B:45-344; 1u5i​ A:45-344; 1kfx​ L:45-344; 1kfu​ L:45-344; 1ziv​ A:42-337 IPR001300 PF00648…
Pfam
PF00648

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Discovery

Cleavage specificity

Extended family

Function

Clinical significance

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Calpain connects Entity context

The extracted context around Calpain shows recurring relationship patterns in the source. For example, Calpain → Ca2, CANP, CAPN1, CAPN2, CAPN4, CAPNS1, II, In, Shortly, Structurally, The, Their, These, To, When Another extracted example is Calpain → Alzheimer's, At, Ca2, Excessive, Excessively, II, Increase, It, Moreover, Recently, The, This, Upon, When. Use these groups to spot repeated connection types before inspecting the individual relationships.

Calpain

Top relations

related to Discovery · 15
Calpain → Ca2, CANP, CAPN1, CAPN2, CAPN4, CAPNS1, II, In, Shortly, Structurally, The, Their, These, To, When
related to Pathology · 14
Calpain → Alzheimer's, At, Ca2, Excessive, Excessively, II, Increase, It, Moreover, Recently, The, This, Upon, When
related to External links · 12
Calpain → Arizona, Calpain Info, CaMPDB, Cell Migration GatewayAlzheimers, Family, Medicine Medical Subject Headings, MeSH, Modulatory Proteolysis DatabaseThe Calpain, National Library, PMAP The Proteolysis Map-animation, Proteases, University
related to Cleavage specificity · 11
Calpain → Ala, Ala-Glu-Arg-Lys, Amongst, Arguably, DABCYL, EDANS, Glu-Pro-Leu-Phe, No, P1, P2, Phe
related to Function · 11
Calpain → Additionally, Although, Ca2, Calpains, CAPNS1, Detergent, Enhanced, However, Other, Phosphorylation, Under
related to Therapeutic inhibitors · 10
Calpain → ABT-705253, AK275, Also, As, However, MDL28170, PD150606, SJA6017, SNJ-1945, The
related to Extended family · 4
Calpain → As, C2, MEROPS, The Human Genome Project
AlphaFold · 2
Calpain → IPR001300, PF00648
Available protein structures: · 2
Calpain → IPR001300, PF00648
InterPro · 1
Calpain → IPR001300

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

cell calpains also family brain activity proteolysis protein calcium protease known small proteases proteolytic isoforms merops two injury capns1 c2

Calpain relationships Subject–Predicate–Object triples

TTTA extracted 104 structured relationships around Calpain. Examples in this analysis include Calpain → AlphaFold → IPR001300 and Calpain → AlphaFold → PF00648. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
CalpainAlphaFoldIPR0013001.00infobox
CalpainAlphaFoldPF006481.00infobox
CalpainAvailable protein structures:IPR0013001.00infobox
CalpainAvailable protein structures:PF006481.00infobox
CalpainInterProIPR0013001.00infobox
CalpainMEROPSC21.00infobox
CalpainPDB1tl9​ A:55-354; 1kxr​ B:55-354; 1tlo​ A:55-354; 2ary​ B:55-354; 1zcm​ A:55-353; 1mdw​ B:45-344; 1u5i​ A:45-344; 1kfx​ L:45-344; 1kfu​ L:45-344; 1ziv​ A:42-337 IPR001300 PF00648…1.00infobox
CalpainPfamPF006481.00infobox
CalpainPfam clanCL01251.00infobox
CalpainPROSITEPDOC502031.00infobox
CalpainSCOP21mdw / SCOPe / SUPFAM1.00infobox
CalpainSMARTCysPc1.00infobox
CalpainSymbolCalpain1.00infobox
Calpainis atype-protease for the C20.90text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Calpain bring nearby vocabulary together. In this analysis, examples include Also, Known and Family. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Calpain
    • Also
    • Known
    • Family
    • Isoforms
    • Injury
    • Two
    • Protein
    • Proteolysis
    • Brain
    • Calcium
    • Activity
    • Capns1
  • calpain
    • Also
    • Known
    • Family
    • Isoforms
    • Injury
    • Two
    • Protein
    • Proteolysis
    • Brain
    • Calcium
    • Activity
    • Capns1
  • brain
    • Injury
    • Found
    • Ischemic
    • Clan
    • Calpain
    • C2
    • Calcium-dependent
    • Enzymes
    • Merops
    • Ca2
    • Damage
    • Influx
  • traumatic brain injury
    • May
    • Injury
    • Found
    • Ischemic
    • Clan
    • Damage
    • Calpain
    • C2
    • Calcium-dependent
    • Enzymes
    • Merops
    • Ca2
  • extended family
    • Database
    • Proteases
    • C2
    • Cysteine
    • Merops
    • Structure
    • Protease
    • Clan
    • Cleavage
    • Enzymes
    • Ii
    • Isoforms
  • protein kinase a
    • Proteolytic
    • Structure
    • Protease
    • Clan
    • Amino
    • C2
    • Cleavage
    • Enzymes
    • Merops
    • Substrates
    • Found
    • Proteins
  • calcium
    • Proteins
    • Cell
    • Proteolysis
    • Calpains
    • Calpain
    • Ii
    • Ca2
    • Damage
    • Found
    • Influx
    • Ischemic
    • Isoforms
  • cysteine proteases
    • Proteases
    • Proteolytic
    • Protease
    • Protein
    • Family
    • Enzymes
    • Capns1
    • Database
    • Proteins
    • Two
    • Known
    • Small

Connections between topic areas Semantic bridges

For Calpain, one of the stronger structural bridges in this analysis connects Calpain with Clinical significance. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
CalpainClinical significance · splits 63 ⟂ 23
CalpainFunction · splits 66 ⟂ 20
CalpainDiscovery · splits 70 ⟂ 16
CalpainCleavage specificity · splits 72 ⟂ 14
CalpainOverview · splits 77 ⟂ 9
CalpainExtended family · splits 83 ⟂ 3

Map overview Semantic statistics

Calpain

Nodes86
Edges85
Triples104
Avg. degree1.98
Density0.023256
Components1

Source & methodology

TTTA analyzes the structure around Calpain to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Clinical significance, Function & Discovery, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Calpain · EN edition · Analysis: TopicsToTalkAbout

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