Bruton-type agammaglobulinemia

disease
On this page

Also known as agammaglobulinemia, Bruton tyrosine kinaseagammaglobulinemia, BTKagammaglobulinemia, X-linkedagammaglobulinemia, X-linked 1, X-linked recessiveBruton type agammaglobulinemiaBruton's agammaglobulinemiaBruton's Sex-linked agammaglobulinemiaBruton's X-linked agammaglobulinemiaBTK-deficiencyX-linked agammaglobulinemiaXLA

Summary

Bruton-type agammaglobulinemia (MONDO:0010421) is a disease caused by BTK (GenCC Definitive), with 1 cohort gene and 9 clinical trials. Top therapeutic interventions include human immunoglobulin g and melphalan.

At a glance

  • Prevalence: 1-9 / 1 000 000 (Worldwide) [Orphanet-validated]
  • Causal gene: BTK (GenCC Definitive)
  • Cohort genes: 1
  • ClinVar variants: 177
  • Phenotypes (HPO): 35
  • Clinical trials: 9

Clinical features

Epidemiology

Prevalence records

19 prevalence record(s), Orphanet:

TypeClassValueGeographyValidation
Point prevalence1-9 / 1 000 0000.22WorldwideValidated
Point prevalence1-9 / 1 000 0000.18FranceValidated
Point prevalence1-9 / 1 000 0000.21ItalyValidated
Point prevalence<1 / 1 000 0000.08United KingdomValidated
Point prevalence<1 / 1 000 0000.06SpainValidated
Point prevalence<1 / 1 000 0000.03GermanyValidated
Point prevalence<1 / 1 000 0000.09PolandValidated
Point prevalence1-9 / 1 000 0000.13CroatiaValidated
Point prevalence1-9 / 1 000 0000.16HungaryValidated
Point prevalence1-9 / 1 000 0000.25North MacedoniaValidated
Point prevalence1-9 / 1 000 0000.1SloveniaValidated
Point prevalence<1 / 1 000 0000.09SerbiaValidated
Point prevalence<1 / 1 000 0000.04UkraineValidated
Point prevalence<1 / 1 000 0000.06BelarusValidated
Point prevalence<1 / 1 000 0000.03RomaniaValidated
Point prevalence<1 / 1 000 0000.07United StatesValidated
Point prevalence1-9 / 1 000 0000.11Korea, Republic ofValidated
Prevalence at birth1-9 / 1 000 0000.26United StatesValidated
Point prevalence1-9 / 1 000 0000.1EuropeNot yet validated

Signs & symptoms

Clinical features (HPO)

35 HPO clinical features (Orphanet curated; top 35 by frequency):

HPO IDTermFrequency
HP:0000162GlossoptosisVery frequent (80-99%)
HP:0000246SinusitisVery frequent (80-99%)
HP:0000389Chronic otitis mediaVery frequent (80-99%)
HP:0000509ConjunctivitisVery frequent (80-99%)
HP:0000988Skin rashVery frequent (80-99%)
HP:0001508Failure to thriveVery frequent (80-99%)
HP:0001945FeverVery frequent (80-99%)
HP:0002028Chronic diarrheaVery frequent (80-99%)
HP:0002721ImmunodeficiencyVery frequent (80-99%)
HP:0004322Short statureVery frequent (80-99%)
HP:0004432AgammaglobulinemiaVery frequent (80-99%)
HP:0006532Recurrent pneumoniaVery frequent (80-99%)
HP:0012378FatigueVery frequent (80-99%)
HP:0100763Abnormality of the lymphatic systemVery frequent (80-99%)
HP:0100765Abnormality of the tonsilsVery frequent (80-99%)
HP:0100838Recurrent cutaneous abscess formationVery frequent (80-99%)
HP:0200042Skin ulcerVery frequent (80-99%)
HP:0000407Sensorineural hearing impairmentFrequent (30-79%)
HP:0001287MeningitisFrequent (30-79%)
HP:0001369ArthritisFrequent (30-79%)
HP:0001875Decreased total neutrophil countFrequent (30-79%)
HP:0002088Abnormal lung morphologyFrequent (30-79%)
HP:0002901HypocalcemiaFrequent (30-79%)
HP:0100658CellulitisFrequent (30-79%)
HP:0100806SepsisFrequent (30-79%)
HP:0001053Hypopigmented skin patchesOccasional (5-29%)
HP:0001596AlopeciaOccasional (5-29%)
HP:0001824Weight lossOccasional (5-29%)
HP:0001873ThrombocytopeniaOccasional (5-29%)
HP:0001903AnemiaOccasional (5-29%)
HP:0002024MalabsorptionOccasional (5-29%)
HP:0002664NeoplasmOccasional (5-29%)
HP:0002754OsteomyelitisOccasional (5-29%)
HP:0002960AutoimmunityOccasional (5-29%)
HP:0012115HepatitisOccasional (5-29%)

Identifiers

Disease identifiers

FieldValue
Canonical nameBruton-type agammaglobulinemia
Mondo IDMONDO:0010421
MeSHC537409
OMIM300755
Orphanet47
DOIDDOID:14179
NCITC3822
SNOMED CT65880007
UMLSC0221026
MedGen65123
GARD0001033
MedDRA10060360
Is cancer (heuristic)no

Also known as: agammaglobulinemia, Bruton tyrosine kinase · agammaglobulinemia, BTK · agammaglobulinemia, X-linked · agammaglobulinemia, X-linked 1, X-linked recessive · Bruton type agammaglobulinemia · Bruton’s agammaglobulinemia · Bruton’s Sex-linked agammaglobulinemia · Bruton’s X-linked agammaglobulinemia · Bruton-type agammaglobulinemia · BTK-deficiency · X-linked agammaglobulinemia · XLA

Data availability: 177 ClinVar variants · 3 GenCC gene-disease records · 17 cell lines.

Disease family

Classification path: disease › human disease › disease by body system or component › immune system disorderinborn error of immunityB cell deficiencyagammaglobulinemiaisolated agammaglobulinemiaBruton-type agammaglobulinemia

Related subtypes (1): autosomal agammaglobulinemia

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

177 retrieved; paginated sample, class counts are floors:

88 pathogenic, 33 likely pathogenic, 18 pathogenic/likely pathogenic, 15 uncertain significance, 11 conflicting classifications of pathogenicity, 8 benign, 4 benign/likely benign

ClinVarVariant (HGVS)GeneClassificationReview
1012315NM_000061.3(BTK):c.1349+1G>ABTKPathogeniccriteria provided, multiple submitters, no conflicts
1012881NM_000061.3(BTK):c.1106T>C (p.Leu369Pro)BTKPathogeniccriteria provided, multiple submitters, no conflicts
1075550NM_000061.3(BTK):c.83G>T (p.Arg28Leu)BTKPathogenic/Likely pathogeniccriteria provided, multiple submitters, no conflicts
11342NM_000061.3(BTK):c.1574G>A (p.Arg525Gln)BTKPathogenic/Likely pathogeniccriteria provided, multiple submitters, no conflicts
11343NM_000061.3(BTK):c.1288A>G (p.Lys430Glu)BTKPathogenicno assertion criteria provided
11344NM_000061.3(BTK):c.37C>T (p.Arg13Ter)BTKPathogeniccriteria provided, multiple submitters, no conflicts
11345NM_000061.3(BTK):c.43C>T (p.Gln15Ter)BTKPathogenic/Likely pathogeniccriteria provided, multiple submitters, no conflicts
11348NM_000061.3(BTK):c.83G>A (p.Arg28His)BTKPathogeniccriteria provided, multiple submitters, no conflicts
11349NM_000061.3(BTK):c.2T>C (p.Met1Thr)BTKPathogenic/Likely pathogeniccriteria provided, multiple submitters, no conflicts
11351NM_000061.3(BTK):c.97A>C (p.Thr33Pro)BTKPathogenicno assertion criteria provided
11352NM_000061.3(BTK):c.228_231del (p.Glu76fs)BTKPathogeniccriteria provided, single submitter
11353NM_000061.3(BTK):c.141+3_141+4delBTKPathogenicno assertion criteria provided
11354NM_000061.3(BTK):c.310-1G>CBTKPathogeniccriteria provided, single submitter
11355NM_000061.3(BTK):c.310-2A>GBTKPathogenicno assertion criteria provided
11356NM_000061.3(BTK):c.338T>A (p.Val113Asp)BTKPathogenicno assertion criteria provided
11357NM_000061.3(BTK):c.389del (p.Asn130fs)BTKPathogeniccriteria provided, single submitter
11358NM_000061.3(BTK):c.557dup (p.Pro187fs)BTKPathogeniccriteria provided, single submitter
11359NM_000061.3(BTK):c.588_589insCTACATAG (p.Ile197fs)BTKPathogenicno assertion criteria provided
11360NM_000061.3(BTK):c.653del (p.Lys218fs)BTKPathogenicno assertion criteria provided
11361NM_000061.3(BTK):c.718G>T (p.Glu240Ter)BTKPathogenicno assertion criteria provided
11362NM_000061.3(BTK):c.755G>A (p.Trp252Ter)BTKPathogeniccriteria provided, multiple submitters, no conflicts
11363NM_000061.3(BTK):c.763C>T (p.Arg255Ter)BTKPathogeniccriteria provided, multiple submitters, no conflicts
11364NM_000061.3(BTK):c.839+1G>ABTKPathogenicno assertion criteria provided
11365BTK, 1-BP DEL/3-BP INS, CODON 261BTKPathogenicno assertion criteria provided
11366NM_000061.3(BTK):c.862C>T (p.Arg288Trp)BTKPathogenic/Likely pathogeniccriteria provided, multiple submitters, no conflicts
11367NM_000061.3(BTK):c.919A>G (p.Arg307Gly)BTKPathogenicno assertion criteria provided
11368NM_000061.3(BTK):c.1001A>C (p.Tyr334Ser)BTKPathogenicno assertion criteria provided
11369NM_000061.3(BTK):c.974+1delBTKPathogenicno assertion criteria provided
11372NM_000061.3(BTK):c.1116_1131dup (p.Ser378fs)BTKPathogenicno assertion criteria provided
11373NM_000061.3(BTK):c.1223T>C (p.Leu408Pro)BTKPathogenicno assertion criteria provided

Genes & proteins

Mendelian disease overlap and somatic drivers

GenCC: 7 · 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.

GeneClassificationInheritanceDiseaseRecords
BTKDefinitiveX-linkedBruton-type agammaglobulinemia7

Orphanet rare-disease linkage (cohort genes)

GeneOrphanet IDRare disease
BTKOrphanet:47X-linked agammaglobulinemia
BTKOrphanet:632Short stature due to isolated growth hormone deficiency with X-linked hypogammaglobulinemia

Cohort genes → proteins

1 cohort genes, 1 distinct canonical proteins.

Evidence partition

SubsetGenes
multi_evidence1

Cohort genes (full)

SymbolHGNCEnsemblUniProtNameEvidence
BTKHGNC:1133ENSG00000010671Q06187Tyrosine-protein kinase BTKgencc,clinvar

Cohort function summary

Lead sentence per gene, UniProt-curated.

SymbolProtein nameFunction (lead sentence)
BTKTyrosine-protein kinase BTKNon-receptor tyrosine kinase indispensable for B lymphocyte development, differentiation and signaling.

Protein-family classification

Druggable: 1 · Difficult: 0 · Unknown: 0 · Druggable fraction: 1.0

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.

FamilyGenesFoldFDR
Kinase127.7×0.036

Per-gene assignment

SymbolFamilyDruggable?ECInterPro (top 3)
BTKKinaseyes2.7.10.2Prot_kinase_dom, SH2, Ser-Thr/Tyr_kinase_cat_dom

Expression context

Cohort genes with no expression data: 0.

1 cohort gene are a single-cell marker in ≥1 SCXA experiment.

Breadth distribution (Bgee present_calls)

BucketGenes
narrow (1-5 tissues)0
moderate (6-20)0
broad (>20)1
unknown0

Top tissues across cohort

TissueCohort genes
leukocyte1
monocyte1
mononuclear cell1

Per-gene tissue summary (top 30)

SymbolBgee breadthFANTOM5 breadthSCXATop tissues
BTK206broadmarkermonocyte, mononuclear cell, leukocyte

Protein interactions among cohort

Intra-cohort edges: 0.

Hub genes (top 10 by interactor count)

SymbolInteractor count
BTK4,467

Structural data

PDB: 1 · AlphaFold-only: 0 · No structure: 0

Cohort genes with PDB structures (top 30)

SymbolUniProtPDB entries
BTKQ06187156

Function

Pathway analysis

Distinct Reactome pathways touched by cohort: 45. Enrichment computed across 1 evidence-associated genes (1 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 1 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.

PathwayCohort genesFoldFDRSample cohort genes
G-protein beta:gamma signalling11903.3×0.009BTK
Diseases of Immune System1878.5×0.009BTK
Diseases associated with the TLR signaling cascade1878.5×0.009BTK
G beta:gamma signalling through BTK1634.4×0.009BTK
MyD88 deficiency (TLR2/4)1601.0×0.009BTK
IRAK4 deficiency (TLR2/4)1571.0×0.009BTK
DAP12 interactions1475.8×0.009BTK
DAP12 signaling1368.4×0.009BTK
FCERI mediated Ca+2 mobilization1356.9×0.009BTK
Antigen activates B Cell Receptor (BCR) leading to generation of second messengers1356.9×0.009BTK
Parasite infection1346.1×0.009BTK
Leishmania phagocytosis1346.1×0.009BTK
Signaling by the B Cell Receptor (BCR)1346.1×0.009BTK
Antigen processing-Cross presentation1317.2×0.009BTK
RHO GTPases Activate WASPs and WAVEs1317.2×0.009BTK
Fcgamma receptor (FCGR) dependent phagocytosis1278.5×0.010BTK
Fc epsilon receptor (FCERI) signaling1271.9×0.010BTK
FCGR3A-mediated phagocytosis1187.2×0.011BTK
Regulation of actin dynamics for phagocytic cup formation1184.2×0.011BTK
Toll Like Receptor TLR6:TLR2 Cascade1175.7×0.011BTK
Toll Like Receptor 2 (TLR2) Cascade1173.0×0.011BTK
Toll Like Receptor TLR1:TLR2 Cascade1167.9×0.011BTK
Leishmania infection1163.1×0.011BTK
Parasitic Infection Pathways1163.1×0.011BTK
MyD88:MAL(TIRAP) cascade initiated on plasma membrane1152.3×0.012BTK
G alpha (12/13) signalling events1137.6×0.012BTK
Toll Like Receptor 4 (TLR4) Cascade1131.3×0.012BTK
ER-Phagosome pathway1129.8×0.012BTK
Toll-like Receptor Cascades1124.1×0.013BTK
Potential therapeutics for SARS1114.2×0.013BTK

GO biological processes by enrichment

Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 1 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.

GO termCohort genesFoldFDRSample cohort genes
regulation of B cell cytokine production116852.0×7e-04BTK
monocyte proliferation116852.0×7e-04BTK
positive regulation of interleukin-17A production116852.0×7e-04BTK
positive regulation of type I hypersensitivity18426.0×7e-04BTK
B cell affinity maturation18426.0×7e-04BTK
regulation of B cell apoptotic process18426.0×7e-04BTK
positive regulation of type III hypersensitivity15617.3×7e-04BTK
proteoglycan catabolic process15617.3×7e-04BTK
positive regulation of synoviocyte proliferation15617.3×7e-04BTK
eosinophil homeostasis15617.3×7e-04BTK
cellular response to molecule of fungal origin14213.0×9e-04BTK
histamine secretion by mast cell13370.4×0.001BTK
positive regulation of cGAS/STING signaling pathway12106.5×0.001BTK
neutrophil homeostasis11532.0×0.002BTK
cellular response to interleukin-711296.3×0.002BTK
positive regulation of B cell differentiation11123.5×0.002BTK
MyD88-dependent toll-like receptor signaling pathway1936.2×0.002BTK
negative regulation of B cell proliferation1936.2×0.002BTK
negative regulation of interleukin-10 production1732.7×0.003BTK
Fc-epsilon receptor signaling pathway1732.7×0.003BTK
positive regulation of NLRP3 inflammasome complex assembly1581.1×0.003BTK
mesoderm development1526.6×0.004BTK
positive regulation of immunoglobulin production1481.5×0.004BTK
B cell activation1455.5×0.004BTK
cell maturation1443.5×0.004BTK
peptidyl-tyrosine phosphorylation1421.3×0.004BTK
cellular response to reactive oxygen species1411.0×0.004BTK
B cell receptor signaling pathway1401.2×0.004BTK
positive regulation of B cell proliferation1343.9×0.004BTK
positive regulation of phagocytosis1318.0×0.004BTK

Therapeutics

Drug target analysis

Approved (phase 4): 1 · Phase ≥3: 1 · Phased (≥1): 1 · Undrugged: 0

Druggability breadth: 1 of 1 evidence-associated genes (100%) 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.

SymbolExample approved molecule
BTKPONATINIB

Top cohort targets by molecule count

SymbolMoleculesMax phase
BTK844

Drugs targeting cohort genes (top 30)

MoleculeMax phaseTargets in cohort
PONATINIB4BTK
FEDRATINIB4BTK
NERATINIB4BTK
IBRUTINIB4BTK
ENTRECTINIB4BTK
CERITINIB4BTK
VANDETANIB4BTK
BOSUTINIB4BTK
OSIMERTINIB4BTK
BRIGATINIB4BTK
FUTIBATINIB4BTK
ACALABRUTINIB4BTK
OLMUTINIB4BTK
ZANUBRUTINIB4BTK
TIRABRUTINIB4BTK
RITLECITINIB4BTK
PIRTOBRUTINIB4BTK
NINTEDANIB4BTK
SUNITINIB4BTK
DASATINIB4BTK
MITOXANTRONE4BTK
CRIZOTINIB4BTK
SARACATINIB3BTK
CANERTINIB3BTK
ENTOSPLETINIB3BTK
TESEVATINIB3BTK
POZIOTINIB3BTK
ROCILETINIB3BTK
PYROTINIB3BTK
RILZABRUTINIB3BTK

Bioactivity and enzyme data

Enzyme cohort genes (≥1 EC): 1.

Cohort genes with ChEMBL bioactivity (full, sorted by assay count)

SymbolAssaysType breakdown
BTK1,836Binding:1810, Functional:23, ADMET:3

Cohort enzymes (BRENDA EC)

SymbolEC numbersNames
BTK2.7.10.2non-specific protein-tyrosine kinase

Cohort genes with high screening signal

≥100 ChEMBL assays — a studied-ness signal; see Therapeutics for approved-drug status.

SymbolChEMBL assays
BTK1,836

Pharmacogenomics

Cohort genes with a PharmGKB record: 1; 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.

CompoundMax phaseCohort target (bioactivity)
PONATINIB4BTK
FEDRATINIB4BTK
NERATINIB4BTK
IBRUTINIB4BTK
ENTRECTINIB4BTK
CERITINIB4BTK
VANDETANIB4BTK
BOSUTINIB4BTK
OSIMERTINIB4BTK
BRIGATINIB4BTK
FUTIBATINIB4BTK
ACALABRUTINIB4BTK
OLMUTINIB4BTK
ZANUBRUTINIB4BTK
TIRABRUTINIB4BTK
RITLECITINIB4BTK
PIRTOBRUTINIB4BTK
NINTEDANIB4BTK
SUNITINIB4BTK
DASATINIB4BTK
MITOXANTRONE4BTK
CRIZOTINIB4BTK
SARACATINIB3BTK
CANERTINIB3BTK
ENTOSPLETINIB3BTK
TESEVATINIB3BTK
POZIOTINIB3BTK
ROCILETINIB3BTK
PYROTINIB3BTK
RILZABRUTINIB3BTK

Druggability pyramid

Cohort genes binned by druggability tier (high → low):

TierDefinitionGenesSymbols
AApproved (phase 4 drug)1BTK
BPhased (≥1) drug, not yet approved0
CDruggable family + PDB, no drug0
DDruggable family + AlphaFold only, no drug0
EDifficult family or no structure, no drug0

Undrugged target profiles

0 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).

Clinical trials & evidence

Clinical trials

Clinical trials: 9.

Phase distribution (across all retrieved trials)

PhaseTrials
Not specified6
PHASE41
PHASE31
PHASE21

Top trials by phase / activity

NCTPhaseStatusTitle
NCT01289847PHASE4COMPLETEDA Study to Find Out How Safe and Effective Gammaplex® is in Young People With Primary Immunodeficiency
NCT00542997PHASE3COMPLETEDStudy of Subcutaneous Immune Globulin in Patients Requiring IgG Replacement Therapy
NCT01821781PHASE2ACTIVE_NOT_RECRUITINGImmune Disorder HSCT Protocol
NCT00001244Not specifiedRECRUITINGImmune Regulation in Patients With Common Variable Immunodeficiency and Related Inborn Errors of Immunity (IEI)
NCT05321407Not specifiedACTIVE_NOT_RECRUITINGCOVID-19 Vaccine Responses in PIDD Subjects
NCT00004341Not specifiedUNKNOWNStudy of Genetic and Molecular Defects in Primary Immunodeficiency Disorders
NCT00006054Not specifiedTERMINATEDAllogeneic Bone Marrow Transplantation in Patients With Primary Immunodeficiencies
NCT02234791Not specifiedUNKNOWNMutation of the BTK Gene and Genotype-phenotype Correlation of Chinese Patients With X-Linked Agammaglobulinemia
NCT02960399Not specifiedTERMINATEDAssessment of Immunogenicity of Zostavax® in Patients With Antibody Deficiency 60 Years of Age and Older

Drugs tested across these trials (top 30)

MoleculeMax phaseTrials referencing
HUMAN IMMUNOGLOBULIN G41
MELPHALAN41