On this page, you will find information about a genetic change that was identified in a UDN participant. We are trying to find others with the same or similar condition.

Sharing information on this website is not a requirement of UDN participation. Only descriptions about participants who give explicit consent will appear here.

Date of Report

Sep 08, 2016

Full Name

Coiled-coil domain containing 40

Chromosome 17 (17q25.3)


The CCDC40 gene codes for a protein that is necessary for motile cilia function (Becker-Heck et al., 2011).

Database Links

GeneCards: GC17P080037

Genetics Home Reference: CCDC40 gene

NCBI Gene: 55036

OMIM: 613799

UniProtKB/Swiss-Prot:  Q4G0X9

Clinical Significance

Changes in the CCDC40 gene have been found in individuals with primary ciliary dyskinesia.

A change in the CCDC40 gene was also identified in a UDN participant. Research is underway to see if this change is causing symptoms in this patient.

The participant, a 14 year old female with primary ciliary dyskinesia was found to carry the following genetic change in the CCDC40 gene: c.334A>G/p.T112A.

Gene CCDC40
Inheritance Pattern autosomal recessive
Position chr17:78013851
Transcript NM_017950
DNA Change c.334A>G
Protein Change p.T112A

The patient was born early at 35 weeks. During the first few months of her life, she had multiple episodes of “turning blue” (cyanotic episodes) and was diagnosed with many upper respiratory and ear infections. She also had bronchitis and pneumonia several times. Around age 6, she started to complain of difficulty breathing.

Over time, the patient has continued to suffer from frequent infections, chronic lung disease, and asthma. At age 12, a buildup of fluid between the tissues that line the lungs and chest (pleural effusion) was noticed on an X-ray. The patient also has acid reflux disease (gastroesophageal reflux).

Some of her other features include:

  • Fainting (syncope)
  • Hay fever (allergic rhinitis)
  • Low oxygen concentration in blood (hypoxemia)
  • Dyslexia
  • Headache
  • Increased head size (macrocephaly)
  • Ringing in ears (tinnitus)
  • Recurrent ear infections (otitis media)
  • Nose bleeds (epistaxis)
  • High palate
  • Small uvula
  • Acne
  • Decreased lung (pulmonary) function
  • Inflammation of lung tissue lining (pleuritis)
  • Lung collapse (atelectasis, spontaneous pneumothorax)
  • Increased body weight
  • Mild scoliosis
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