Paediatric disorders - additional genes

Gene: CTU2

Green List (high evidence)

CTU2 (cytosolic thiouridylase subunit 2)
EnsemblGeneIds (GRCh38): ENSG00000174177
EnsemblGeneIds (GRCh37): ENSG00000174177
OMIM: 617057, Gene2Phenotype
CTU2 is in 8 panels

3 reviews

Arina Puzriakova (Genomics England Curator)

Green List (high evidence)

The rating of this gene has been updated to Green following NHS Genomic Medicine Service approval.
Created: 31 Jan 2023, 10:54 a.m. | Last Modified: 31 Jan 2023, 10:54 a.m.
Panel Version: 2.7

Ivone Leong (Genomics England Curator)

Comment on list classification: New gene added by Zornitza Stark (Australian Genomics). This gene is associated with a relevant phenotype in OMIM and Gene2Phenotype.

PMID:26633546. Affected members of all 3 families have microcephaly, facial dysmorphia and unilateral renal agenesis. 2/3 families have ambiguous genitalia; however, only 1 family had karyotyping done, which showed normal male karyotype (46 XY). 2/3 had congenital heart disease.

PMID: 27480277. Same variant as PMID:26633546. Affected individuals in this extended family have similar phenotype as PMID:26633546. Patient 1: in addition to microcephaly also has renal anomalies (small kidneys) and possible ambiguous genitalia with normal XY karyotype. Patient 2: cousin of patient 1. In addition to microcephaly did not have renal anomalies and nor ambiguous genitalia. Both patients have congenital heart disease.

PMID: 31301155. 5 new cases, all with microcephaly. 4/5 with renal anomalies, 2/5 with ambiguous genitalia, 4/5 congenital heart disease.

There is enough evidence to support a gene-disease association. This gene should be rated Green at the next review.
Created: 6 May 2021, 10:55 a.m. | Last Modified: 6 May 2021, 10:55 a.m.
Panel Version: 2.146

Zornitza Stark (Australian Genomics)

Green List (high evidence)

Dysmorphic facies, renal agenesis, ambiguous genitalia, microcephaly, polydactyly and lissencephaly (DREAM-PL) as proposed by authors.

PMID: 26633546
- 3 consanguineous families all with the same splice variant (NM_001012762.1:c.873G>A). Assumed to be founder variant
- all had microcephaly but measurements were not provided

PMID: 27480277
- 2 additional patients from an extended consanguineous family with the same variant as above
- Patient 1: head circumference of -3.5SD at birth, not growing
- Patient 2: head circumference of -4.3 SD

PMID: 31301155
- 5 new patients with microcephaly (no measurements provided)
- 3x PTVs and 1x missense
Sources: Expert list
Created: 4 Sep 2020, 10:20 a.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Microcephaly, facial dysmorphism, renal agenesis, and ambiguous genitalia syndrome (MIM#618142)


Variants in this GENE are reported as part of current diagnostic practice


Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
  • Expert Review Green
  • Expert list
  • Microcephaly, facial dysmorphism, renal agenesis, and ambiguous genitalia syndrome, OMIM:618142
Clinvar variants
Variants in CTU2
Panels with this gene

History Filter Activity

31 Jan 2023, Gel status: 3

Removed Tag

Arina Puzriakova (Genomics England Curator)

Tag Q2_21_rating was removed from gene: CTU2.

31 Jan 2023, Gel status: 3

Added New Source, Added New Source, Status Update

Arina Puzriakova (Genomics England Curator)

Source Expert Review Green was added to CTU2. Source NHS GMS was added to CTU2. Rating Changed from Amber List (moderate evidence) to Green List (high evidence)

6 May 2021, Gel status: 2

Created, Added New Source, Added Tag, Set mode of inheritance, Set publications, Set Phenotypes

Ivone Leong (Genomics England Curator)

gene: CTU2 was added gene: CTU2 was added to Paediatric disorders - additional genes. Sources: Expert Review Amber,Expert list Q2_21_rating tags were added to gene: CTU2. Mode of inheritance for gene: CTU2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CTU2 were set to 26633546; 27480277; 31301155 Phenotypes for gene: CTU2 were set to Microcephaly, facial dysmorphism, renal agenesis, and ambiguous genitalia syndrome, OMIM:618142