Amyotrophic lateral sclerosis type 16
diseaseOn this page
Also known as ALS16amyotrophic lateral sclerosis 16, juvenileamyotrophic lateral sclerosis caused by mutation in SIGMAR1SIGMAR1 amyotrophic lateral sclerosis
Summary
Amyotrophic lateral sclerosis type 16 (MONDO:0013715) is a disease caused by SIGMAR1 (GenCC Strong), with 3 cohort genes.
At a glance
- Causal gene: SIGMAR1 (GenCC Strong)
- Cohort genes: 3
- ClinVar variants: 183
Clinical features
No curated clinical features (Orphanet) for this disease.
Identifiers
Disease identifiers
| Field | Value |
|---|---|
| Canonical name | amyotrophic lateral sclerosis type 16 |
| Mondo ID | MONDO:0013715 |
| OMIM | 614373 |
| DOID | DOID:0060207 |
| UMLS | C3280587 |
| MedGen | 482217 |
| GARD | 0015794 |
| Is cancer (heuristic) | no |
Also known as: ALS16 · amyotrophic lateral sclerosis 16, juvenile · amyotrophic lateral sclerosis caused by mutation in SIGMAR1 · SIGMAR1 amyotrophic lateral sclerosis
Data availability: 183 ClinVar variants · 3 GenCC gene-disease records.
Disease family
Classification path: disease › human disease › disease by body system or component › nervous system disorder › central nervous system disorder › spinal cord disorder › anterior horn disorder › amyotrophic lateral sclerosis › familial amyotrophic lateral sclerosis › juvenile amyotrophic lateral sclerosis › amyotrophic lateral sclerosis type 16
Related subtypes (3): amyotrophic lateral sclerosis type 2, juvenile, juvenile amyotrophic lateral sclerosis with dementia, amyotrophic lateral sclerosis type 5
Genetics & variants
GWAS landscape
No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.
Variant details and genetic-evidence tiers
ClinVar germline variants
183 retrieved; paginated sample, class counts are floors:
77 likely benign, 69 uncertain significance, 12 pathogenic, 10 likely pathogenic, 8 benign, 3 conflicting classifications of pathogenicity, 2 benign/likely benign, 2 pathogenic/likely pathogenic
| ClinVar | Variant (HGVS) | Gene | Classification | Review |
|---|---|---|---|---|
| 1454893 | NM_005866.4(SIGMAR1):c.86G>A (p.Trp29Ter) | LOC130001681 | Pathogenic | criteria provided, single submitter |
| 2083521 | NM_005866.4(SIGMAR1):c.125_126del (p.Ile42fs) | LOC130001681 | Pathogenic | criteria provided, single submitter |
| 569448 | NM_005866.4(SIGMAR1):c.13del (p.Val5fs) | LOC130001681 | Pathogenic | criteria provided, single submitter |
| 985499 | NM_005866.4(SIGMAR1):c.14_20dup (p.Arg8fs) | LOC130001681 | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1067324 | NM_005866.4(SIGMAR1):c.492G>A (p.Trp164Ter) | SIGMAR1 | Pathogenic | criteria provided, single submitter |
| 209190 | NM_005866.4(SIGMAR1):c.283dup (p.Leu95fs) | SIGMAR1 | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 2938415 | NM_005866.4(SIGMAR1):c.456_471del (p.Val153fs) | SIGMAR1 | Pathogenic | criteria provided, single submitter |
| 2945263 | NM_005866.4(SIGMAR1):c.374C>A (p.Ser125Ter) | SIGMAR1 | Pathogenic | criteria provided, single submitter |
| 30238 | NM_005866.4(SIGMAR1):c.304G>C (p.Glu102Gln) | SIGMAR1 | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 3748188 | NM_005866.4(SIGMAR1):c.403C>T (p.Gln135Ter) | SIGMAR1 | Pathogenic | criteria provided, single submitter |
| 3749597 | NM_005866.4(SIGMAR1):c.217_220del (p.Val73fs) | SIGMAR1 | Pathogenic | criteria provided, single submitter |
| 3756143 | NM_005866.4(SIGMAR1):c.445+1G>A | SIGMAR1 | Pathogenic | criteria provided, single submitter |
| 575556 | NM_005866.4(SIGMAR1):c.194T>A (p.Leu65Gln) | SIGMAR1 | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 650504 | NM_005866.4(SIGMAR1):c.19del (p.Arg7fs) | SIGMAR1 | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 4278117 | NM_005866.4(SIGMAR1):c.73del (p.Val25fs) | LOC130001681 | Likely pathogenic | criteria provided, single submitter |
| 1067640 | NM_005866.4(SIGMAR1):c.152-2A>T | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 1285377 | NM_005866.4(SIGMAR1):c.109_110del (p.Phe37fs) | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 1699407 | NM_005866.4(SIGMAR1):c.637G>A (p.Glu213Lys) | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 4278097 | NM_005866.4(SIGMAR1):c.672A>G (p.Ter224Trp) | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 431074 | NM_005866.4(SIGMAR1):c.446-25_*40del | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 431075 | NM_005866.4(SIGMAR1):c.561_576del (p.Asp188fs) | SIGMAR1 | Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 4356097 | NM_005866.4(SIGMAR1):c.353-2A>G | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 873316 | NM_005866.4(SIGMAR1):c.448G>A (p.Glu150Lys) | SIGMAR1 | Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 873317 | NM_005866.4(SIGMAR1):c.451A>G (p.Thr151Ala) | SIGMAR1 | Likely pathogenic | criteria provided, single submitter |
| 2196903 | NM_005866.4(SIGMAR1):c.356G>A (p.Arg119His) | SIGMAR1 | Conflicting classifications of pathogenicity | criteria provided, conflicting classifications |
| 465869 | NM_005866.4(SIGMAR1):c.463G>A (p.Gly155Arg) | SIGMAR1 | Conflicting classifications of pathogenicity | criteria provided, conflicting classifications |
| 573115 | NM_005866.4(SIGMAR1):c.632G>A (p.Arg211Gln) | SIGMAR1 | Conflicting classifications of pathogenicity | criteria provided, conflicting classifications |
| 584345 | NC_000009.11:g.(?34458984)(36277059_?)dup | CREB3 | Uncertain significance | criteria provided, single submitter |
| 1001150 | NM_005866.4(SIGMAR1):c.61G>A (p.Val21Met) | LOC130001681 | Uncertain significance | criteria provided, multiple submitters, no conflicts |
| 1025205 | NM_005866.4(SIGMAR1):c.89T>C (p.Leu30Pro) | LOC130001681 | Uncertain significance | criteria provided, single submitter |
Genes & proteins
Mendelian disease overlap and somatic drivers
GenCC: 6 · Orphanet: 2 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0
GenCC gene–disease validity (cohort genes)
the Disease column is the GenCC-asserted condition — a cohort gene’s strongest validity may be for a related predisposition syndrome.
| Gene | Classification | Inheritance | Disease | Records |
|---|---|---|---|---|
| SIGMAR1 | Strong | Autosomal recessive | amyotrophic lateral sclerosis type 16 | 6 |
Orphanet rare-disease linkage (cohort genes)
| Gene | Orphanet ID | Rare disease |
|---|---|---|
| SIGMAR1 | Orphanet:139552 | Distal hereditary motor neuropathy, Jerash type |
| SIGMAR1 | Orphanet:300605 | Juvenile amyotrophic lateral sclerosis |
Cohort genes → proteins
3 cohort genes, 3 distinct canonical proteins.
Evidence partition
| Subset | Genes |
|---|---|
| multi_evidence | 3 |
Cohort genes (full)
| Symbol | HGNC | Ensembl | UniProt | Name | Evidence |
|---|---|---|---|---|---|
| SIGMAR1 | HGNC:8157 | ENSG00000147955 | Q99720 | Sigma non-opioid intracellular receptor 1 | gencc,clinvar |
| CREB3 | HGNC:2347 | ENSG00000107175 | O43889 | Cyclic AMP-responsive element-binding protein 3 | clinvar |
| SPATA31G1 | HGNC:31418 | ENSG00000174038 | Q5VYM1 | Spermatogenesis-associated protein 31G1 | clinvar |
Cohort function summary
Lead sentence per gene, UniProt-curated.
| Symbol | Protein name | Function (lead sentence) |
|---|---|---|
| SIGMAR1 | Sigma non-opioid intracellular receptor 1 | Functions in lipid transport from the endoplasmic reticulum and is involved in a wide array of cellular functions probably through regulation of the biogenesis of lipid microdomains at the plasma membrane. |
| CREB3 | Cyclic AMP-responsive element-binding protein 3 | Endoplasmic reticulum (ER)-bound sequence-specific transcription factor that directly binds DNA and activates transcription. |
| SPATA31G1 | Spermatogenesis-associated protein 31G1 | Dispensable for normal development and fertility. |
Protein-family classification
Druggable: 0 · Difficult: 0 · Unknown: 3 · Druggable fraction: 0.0
Family distribution
Cohort families vs a genome-wide background (hypergeometric, BH-FDR; fold = observed/expected). Counts kept; sorted by enrichment, so the catch-all Other/Unknown bucket no longer leads.
| Family | Genes | Fold | FDR |
|---|---|---|---|
| Other/Unknown | 3 | 1.8× | 0.174 |
Per-gene assignment
| Symbol | Family | Druggable? | EC | InterPro (top 3) |
|---|---|---|---|---|
| SIGMAR1 | Other/Unknown | no | ERG2_sigma1_rcpt-like | |
| CREB3 | Other/Unknown | no | bZIP, bZIP_sf, CREB_ATF_subfamily | |
| SPATA31G1 | Other/Unknown | no | Spata31g1-like |
Expression context
Cohort genes with no expression data: 0.
2 cohort genes are a single-cell marker in ≥1 SCXA experiment.
Breadth distribution (Bgee present_calls)
| Bucket | Genes |
|---|---|
| narrow (1-5 tissues) | 0 |
| moderate (6-20) | 0 |
| broad (>20) | 3 |
| unknown | 0 |
Top tissues across cohort
| Tissue | Cohort genes |
|---|---|
| liver | 1 |
| right lobe of liver | 1 |
| stromal cell of endometrium | 1 |
| adenohypophysis | 1 |
| popliteal artery | 1 |
| right testis | 1 |
| cardiac muscle of right atrium | 1 |
| kidney epithelium | 1 |
| left ventricle myocardium | 1 |
Per-gene tissue summary (top 30)
| Symbol | Bgee breadth | FANTOM5 breadth | SCXA | Top tissues |
|---|---|---|---|---|
| SIGMAR1 | 282 | ubiquitous | marker | right lobe of liver, stromal cell of endometrium, liver |
| CREB3 | 276 | ubiquitous | marker | adenohypophysis, popliteal artery, right testis |
| SPATA31G1 | 153 | tissue_specific | yes | kidney epithelium, cardiac muscle of right atrium, left ventricle myocardium |
Protein interactions among cohort
Intra-cohort edges: 0.
Hub genes (top 10 by interactor count)
| Symbol | Interactor count |
|---|---|
| SIGMAR1 | 1,993 |
| CREB3 | 1,969 |
| SPATA31G1 | 811 |
Structural data
PDB: 1 · AlphaFold-only: 2 · No structure: 0
Cohort genes with PDB structures (top 30)
| Symbol | UniProt | PDB entries |
|---|---|---|
| SIGMAR1 | Q99720 | 5 |
AlphaFold-only cohort genes (top 30 by pLDDT)
| Symbol | UniProt | pLDDT |
|---|---|---|
| CREB3 | O43889 | 61.35 |
| SPATA31G1 | Q5VYM1 | 39.71 |
Function
Pathway analysis
Distinct Reactome pathways touched by cohort: 6. Enrichment computed across 3 evidence-associated genes (2 with Reactome annotation).
Pathways by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 2 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| Pathway | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| CREB3 factors activate genes | 1 | 634.4× | 0.009 | CREB3 |
| Potential therapeutics for SARS | 1 | 57.1× | 0.052 | SIGMAR1 |
| SARS-CoV Infections | 1 | 27.7× | 0.072 | SIGMAR1 |
| Viral Infection Pathways | 1 | 15.4× | 0.095 | SIGMAR1 |
| Infectious disease | 1 | 12.4× | 0.095 | SIGMAR1 |
| Disease | 1 | 6.5× | 0.147 | SIGMAR1 |
GO biological processes by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 2 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| GO term | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| positive regulation of deacetylase activity | 1 | 8426.0× | 0.003 | CREB3 |
| release from viral latency | 1 | 2808.7× | 0.004 | CREB3 |
| response to alcohol | 1 | 766.0× | 0.008 | SIGMAR1 |
| induction of positive chemotaxis | 1 | 495.6× | 0.008 | CREB3 |
| protein homotrimerization | 1 | 495.6× | 0.008 | SIGMAR1 |
| negative regulation of endoplasmic reticulum stress-induced intrinsic apoptotic signaling pathway | 1 | 421.3× | 0.008 | CREB3 |
| positive regulation of monocyte chemotaxis | 1 | 401.2× | 0.008 | CREB3 |
| regulation of neuron apoptotic process | 1 | 351.1× | 0.008 | SIGMAR1 |
| integrated stress response signaling | 1 | 351.1× | 0.008 | CREB3 |
| positive regulation of calcium ion transport | 1 | 290.6× | 0.008 | CREB3 |
| regulation of postsynapse assembly | 1 | 172.0× | 0.013 | SIGMAR1 |
| endoplasmic reticulum unfolded protein response | 1 | 147.8× | 0.013 | CREB3 |
| negative regulation of cell cycle | 1 | 145.3× | 0.013 | CREB3 |
| lipid transport | 1 | 131.7× | 0.013 | SIGMAR1 |
| DNA-templated transcription | 1 | 112.3× | 0.013 | CREB3 |
| regulation of cell growth | 1 | 110.9× | 0.013 | CREB3 |
| chemotaxis | 1 | 68.0× | 0.021 | CREB3 |
| regulation of cell population proliferation | 1 | 57.7× | 0.023 | CREB3 |
| regulation of apoptotic process | 1 | 41.7× | 0.030 | CREB3 |
| positive regulation of cell migration | 1 | 30.9× | 0.039 | CREB3 |
| nervous system development | 1 | 23.0× | 0.049 | SIGMAR1 |
| positive regulation of DNA-templated transcription | 1 | 14.0× | 0.077 | CREB3 |
| positive regulation of transcription by RNA polymerase II | 1 | 7.4× | 0.136 | CREB3 |
| regulation of transcription by RNA polymerase II | 1 | 5.8× | 0.164 | CREB3 |
Therapeutics
Drug target analysis
Approved (phase 4): 1 · Phase ≥3: 1 · Phased (≥1): 1 · Undrugged: 2
Druggability breadth: 1 of 3 evidence-associated genes (33%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).
Genes with an approved drug
The molecule shown is one approved compound that hits the gene — not necessarily a drug of choice or one indicated for this disease.
| Symbol | Example approved molecule |
|---|---|
| SIGMAR1 | PENTAZOCINE |
Top cohort targets by molecule count
| Symbol | Molecules | Max phase |
|---|---|---|
| SIGMAR1 | 148 | 4 |
| CREB3 | 0 | 0 |
| SPATA31G1 | 0 | 0 |
Drugs targeting cohort genes (top 30)
| Molecule | Max phase | Targets in cohort |
|---|---|---|
| PENTAZOCINE | 4 | SIGMAR1 |
| PROGESTERONE | 4 | SIGMAR1 |
| METHYSERGIDE | 4 | SIGMAR1 |
| DICYCLOMINE | 4 | SIGMAR1 |
| PROPARACAINE | 4 | SIGMAR1 |
| PRAMOXINE | 4 | SIGMAR1 |
| DIMENHYDRINATE | 4 | SIGMAR1 |
| DIHYDROERGOTAMINE MESYLATE | 4 | SIGMAR1 |
| CINACALCET HYDROCHLORIDE | 4 | SIGMAR1 |
| AZELASTINE HYDROCHLORIDE | 4 | SIGMAR1 |
| METHAMPHETAMINE | 4 | SIGMAR1 |
| BENZTROPINE | 4 | SIGMAR1 |
| LEVOBUNOLOL | 4 | SIGMAR1 |
| DEXCHLORPHENIRAMINE | 4 | SIGMAR1 |
| RAMELTEON | 4 | SIGMAR1 |
| OXYBUTYNIN | 4 | SIGMAR1 |
| MIFEPRISTONE | 4 | SIGMAR1 |
| ILOPERIDONE | 4 | SIGMAR1 |
| TRIHEXYPHENIDYL | 4 | SIGMAR1 |
| TRIFLUPERIDOL | 4 | SIGMAR1 |
| TEGASEROD MALEATE | 4 | SIGMAR1 |
| HYDROXYCHLOROQUINE | 4 | SIGMAR1 |
| PRAZOSIN HYDROCHLORIDE | 4 | SIGMAR1 |
| VILAZODONE HYDROCHLORIDE | 4 | SIGMAR1 |
| CLEMASTINE | 4 | SIGMAR1 |
| DOXEPIN | 4 | SIGMAR1 |
| PROPRANOLOL HYDROCHLORIDE | 4 | SIGMAR1 |
| BETAXOLOL HYDROCHLORIDE | 4 | SIGMAR1 |
| LOPERAMIDE HYDROCHLORIDE | 4 | SIGMAR1 |
| TERCONAZOLE | 4 | SIGMAR1 |
Bioactivity and enzyme data
Enzyme cohort genes (≥1 EC): 0.
Cohort genes with ChEMBL bioactivity (full, sorted by assay count)
| Symbol | Assays | Type breakdown |
|---|---|---|
| SIGMAR1 | 619 | Binding:610, Functional:5, ADMET:3, Unclassified:1 |
Cohort genes with high screening signal
≥100 ChEMBL assays — a studied-ness signal; see Therapeutics for approved-drug status.
| Symbol | ChEMBL assays |
|---|---|
| SIGMAR1 | 619 |
Pharmacogenomics
Cohort genes with a PharmGKB record: 3; with CPIC/DPWG dosing guidelines: 0.
No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).
Chemical tractability of cohort targets
30 approved/phased compounds have measured bioactivity against a cohort gene (and aren’t yet in disease-level trials). This is a research / tractability signal, NOT a therapeutic recommendation — a bioactivity row often reflects off-target or screening binding (e.g. promiscuous kinase inhibitors against a cohort kinase), implying no disease mechanism.
| Compound | Max phase | Cohort target (bioactivity) |
|---|---|---|
| PENTAZOCINE | 4 | SIGMAR1 |
| PROGESTERONE | 4 | SIGMAR1 |
| METHYSERGIDE | 4 | SIGMAR1 |
| DICYCLOMINE | 4 | SIGMAR1 |
| PROPARACAINE | 4 | SIGMAR1 |
| PRAMOXINE | 4 | SIGMAR1 |
| DIMENHYDRINATE | 4 | SIGMAR1 |
| DIHYDROERGOTAMINE MESYLATE | 4 | SIGMAR1 |
| CINACALCET HYDROCHLORIDE | 4 | SIGMAR1 |
| AZELASTINE HYDROCHLORIDE | 4 | SIGMAR1 |
| METHAMPHETAMINE | 4 | SIGMAR1 |
| BENZTROPINE | 4 | SIGMAR1 |
| LEVOBUNOLOL | 4 | SIGMAR1 |
| DEXCHLORPHENIRAMINE | 4 | SIGMAR1 |
| RAMELTEON | 4 | SIGMAR1 |
| OXYBUTYNIN | 4 | SIGMAR1 |
| MIFEPRISTONE | 4 | SIGMAR1 |
| ILOPERIDONE | 4 | SIGMAR1 |
| TRIHEXYPHENIDYL | 4 | SIGMAR1 |
| TRIFLUPERIDOL | 4 | SIGMAR1 |
| TEGASEROD MALEATE | 4 | SIGMAR1 |
| HYDROXYCHLOROQUINE | 4 | SIGMAR1 |
| PRAZOSIN HYDROCHLORIDE | 4 | SIGMAR1 |
| VILAZODONE HYDROCHLORIDE | 4 | SIGMAR1 |
| CLEMASTINE | 4 | SIGMAR1 |
| DOXEPIN | 4 | SIGMAR1 |
| PROPRANOLOL HYDROCHLORIDE | 4 | SIGMAR1 |
| BETAXOLOL HYDROCHLORIDE | 4 | SIGMAR1 |
| LOPERAMIDE HYDROCHLORIDE | 4 | SIGMAR1 |
| TERCONAZOLE | 4 | SIGMAR1 |
Druggability pyramid
Cohort genes binned by druggability tier (high → low):
| Tier | Definition | Genes | Symbols |
|---|---|---|---|
| A | Approved (phase 4 drug) | 1 | SIGMAR1 |
| B | Phased (≥1) drug, not yet approved | 0 | |
| C | Druggable family + PDB, no drug | 0 | |
| D | Druggable family + AlphaFold only, no drug | 0 | |
| E | Difficult family or no structure, no drug | 2 | CREB3, SPATA31G1 |
Undrugged target profiles
2 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).
| Symbol | ChEMBL assays | Drugged partners (top 3) |
|---|---|---|
| CREB3 | 0 | — |
| SPATA31G1 | 0 | — |
Clinical trials & evidence
Clinical trials
Clinical trials: 0.