raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:79321

ALG3-CDG

Synonyms: CDG syndrome type Id · CDG-Id · CDG1D · Carbohydrate deficient glycoprotein syndrome type Id · Congenital disorder of glycosylation type 1d · Congenital disorder of glycosylation type Id · Mannosyltransferase 6 deficiency

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A form of congenital disorders of N-linked glycosylation characterized by severe neurological involvement, including hypotonia, developmental delay, intellectual disability, postnatal microcephaly, and progressive brain and cerebellar atrophy. Epilepsy with hypsarrythmia is frequently reported. Additional features that may be observed include failure to thrive, arthrogryposis multiplex congenita (AMC), vision impairment (optic atrophy, iris coloboma) and facial dysmorphism (hypertelorism with a broad nasal bridge, large and thick ears, thin lips, micrognathia). The disease is caused by loss of function mutations of the gene <i>ALG3</i> (3q27.3).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enALG3-CDGCDG syndrome type Id · CDG-Id · CDG1D · Carbohydrate deficient glycoprotein syndrome type Id · Congenital disorder of glycosylation type 1d · Congenital disorder of glycosylation type Id · Mannosyltransferase 6 deficiency
frALG3-CDGAnomalie congénitale de la glycosylation type 1d · Anomalie congénitale de la glycosylation type Id · CDG-Id · CDG1D · Déficit en mannosyltransférase 6 · Syndrome CDG type Id · Syndrome des glycoprotéines déficientes en hydrates de carbone type Id
deALG3-CDGCDG-Id · CDG-Syndrom Typ Id · CDG1D · Kohlenhydrat-defizientes Glykoprotein-Syndrom Id · Kongenitaler Defekt der Glycoproteinbiosynthese Typ Id · Mannosyltransferase 6-Mangel
esALG3-CDGCDG-Id · CDG1D · Deficiencia de manosiltransferasa 6 · Síndrome CDG tipo Id · Síndrome de glicoproteínas deficientes en carbohidratos tipo Id · Trastorno congénito de la glicosilación tipo 1d · Trastorno congénito de la glicosilación tipo Id
itALG3-CDGCDG-Id · CDG1D · Deficit di mannosiltransferasi 6 · Disturbo congenito della glicosilazione, tipo 1d · Disturbo congenito della glicosilazione, tipo Id · Sindrome CDG, tipo Id · Sindrome delle glicoproteine carenti in carboidrati, tipo Id
nlALG3-CDGCDG-Id · CDG-syndroom type Id · CDG1D · Congenitale defecten van de glycosylering type 1d · Congenitale defecten van de glycosylering type Id · Congenitale glycosylatiestoornis type 1d · Congenitale glycosylatiestoornis type Id · Koolhydraatdeficiënt glycoproteïne-syndroom type Id · Mannosyltransferase 6-deficiëntie
ptALG3-CDGCDG-Id · CDG1D · Deficiência em manosiltransferase 6 · Doença congénita da glicosilação tipo 1d · Doença congénita da glicosilação tipo Id · Síndrome CDG tipo Id · Síndrome de glicoproteína deficiente em carbohidratos tipo Id
plALG3-CDGCDG1D · CDG-Id · Niedobór mannozylotransferazy 6 · Wrodzone zaburzenie glikozylacji typu 1d · Wrodzone zaburzenie glikozylacji typu Id · Zespół CDG typu Id · Zespół obniżonej glikozylacji glikoprotein typu Id
csALG3-CDGCDG syndrom, typ Id · CDG-Id · CDG1D · Carbohydrate deficient glycoprotein syndrom type Id · Vrozená porucha glykosylace, typ 1d · Vrozená porucha glykosylace, typ Id · Deficit mannosyltransferázy 6 · Syndrom s deficitem karbohydrátového glykoproteinu typ Id
ukALG3-CDGВуглеводно-дефіцитний глікопротеїновий синдром, тип Id · Тип синдрому CDG Id · CDG1D · CDG-Id · Вроджене порушення глікозилювання типу 1d · Вроджене порушення типу глікозилювання Id · Дефіцит маннозилтрансферази 6
zh先天性糖基化障碍1d型碳水化合物缺乏糖蛋白综合征Id型
trALG3-CDGCDG1D · CDG-Id · CDG sendromu tip Id · Mannoziltransferaz 6 eksikliği · Glikozilasyon tip 1d'nin doğumsal bozukluğu · Glikozilasyon tip Id'nin doğumsal bozukluğu · Karbonhidrat eksikliği olan glikoprotein sendromu tip Id

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM601110Evalidated
ICD-10E77.8NTBTattributedvalidated
ICD-115C54.0NTBTindexvalidated
MONDO0010998Evalidated
MeSHC535742Evalidated
UMLSC1832736Evalidated
GARD9827Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ALG3Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:23056ENSG000002141606087503q27.1ALG3 alpha-1,3- mannosyltransferase20301507[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families15 casesWorldwideCase(s)Validated28122681[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_28122681[PMID]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

45 annotations · validated 2021-09-13
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0012379Abnormal enzyme/coenzyme activity
Very frequent (99-80%)
HP:0002060Abnormal cerebral morphology
HP:0011024Abnormality of the gastrointestinal tract
HP:0011968Feeding difficulties
HP:0001263Global developmental delay
HP:0001252Hypotonia
HP:0002719Recurrent infections
Frequent (79-30%)
HP:0030680Abnormal cardiovascular system morphology
HP:0000377Abnormal pinna morphology
HP:0002813Abnormality of limb bone morphology
HP:0040064Abnormality of limbs
HP:0000818Abnormality of the endocrine system
HP:0000478Abnormality of the eye
HP:0000119Abnormality of the genitourinary system
HP:0000366Abnormality of the nose
HP:0002086Abnormality of the respiratory system
HP:0001410Decreased liver function
HP:0000365Hearing impairment
HP:0000252Microcephaly
HP:0000938Osteopenia
HP:0001250Seizure
Occasional (29-5%)
HP:0001871Abnormality of blood and blood-forming tissues
HP:0012444Brain atrophy
HP:0001332Dystonia
HP:0001276Hypertonia
HP:0003186Inverted nipples
HP:0045005Neural tube defect
HP:0001285Spastic tetraparesis
Very rare (<4-1%)
HP:0000172Abnormality of the uvula
HP:0002804Arthrogryposis multiplex congenita
HP:0001638Cardiomyopathy
HP:0000518Cataract
HP:0012762Cerebral white matter atrophy
HP:0012305Coarctation of the descending aortic arch
HP:0001305Dandy-Walker malformation
HP:0000218High palate
HP:0001010Hypopigmentation of the skin
HP:0002079Hypoplasia of the corpus callosum
HP:0012110Hypoplasia of the pons
HP:0009125Lipodystrophy
HP:0000158Macroglossia
HP:0005871Metaphyseal chondrodysplasia
HP:0000639Nystagmus
HP:0002089Pulmonary hypoplasia
HP:0012157Subcortical cerebral atrophy

Run the differential on the 7 obligate / very frequent terms

Annotation source: 31067009[PMID]_33583022[PMID]_20301507[PMID]

7

Sources for this card