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Reviewed April 2014

What is the official name of the DNAI1 gene?

The official name of this gene is “dynein, axonemal, intermediate chain 1.”

DNAI1 is the gene's official symbol. The DNAI1 gene is also known by other names, listed below.

Read more about gene names and symbols on the About page.

What is the normal function of the DNAI1 gene?

The DNAI1 gene provides instructions for making a protein that is part of a group (complex) of proteins called dynein. This complex functions within cell structures called cilia. Cilia are microscopic, finger-like projections that stick out from the surface of cells. Coordinated back and forth movement of cilia can move the cell or the fluid surrounding the cell. Dynein produces the force needed for cilia to move.

Within the core of cilia (the axoneme), dynein complexes are part of structures known as inner dynein arms (IDAs) and outer dynein arms (ODAs) depending on their location. Coordinated movement of the dynein arms causes the entire axoneme to bend back and forth. IDAs and ODAs have different combinations of protein components (subunits) that are classified by weight as heavy, intermediate, or light chains. The DNAI1 gene provides instructions for making intermediate chain 1, which is found in ODAs. Other subunits are produced from different genes.

Does the DNAI1 gene share characteristics with other genes?

The DNAI1 gene belongs to a family of genes called DN (axonemal dyneins). It also belongs to a family of genes called WDR (WD repeat domain containing).

A gene family is a group of genes that share important characteristics. Classifying individual genes into families helps researchers describe how genes are related to each other. For more information, see What are gene families? in the Handbook.

How are changes in the DNAI1 gene related to health conditions?

primary ciliary dyskinesia - caused by mutations in the DNAI1 gene

At least 21 mutations in the DNAI1 gene have been found to cause primary ciliary dyskinesia, which is a condition characterized by respiratory tract infections, abnormal organ placement, and an inability to have children (infertility). DNAI1 gene mutations result in an absent or abnormal intermediate chain 1. Without a normal version of this subunit, the ODAs cannot form properly and may be shortened or absent. As a result, cilia cannot produce the force needed to bend back and forth. Defective cilia lead to the features of primary ciliary dyskinesia.

Genetics Home Reference provides information about heterotaxy syndrome, which is also associated with changes in the DNAI1 gene.

Where is the DNAI1 gene located?

Cytogenetic Location: 9p13.3

Molecular Location on chromosome 9: base pairs 34,458,752 to 34,520,989

(Homo sapiens Annotation Release 107, GRCh38.p2) (NCBIThis link leads to a site outside Genetics Home Reference.)

The DNAI1 gene is located on the short (p) arm of chromosome 9 at position 13.3.

The DNAI1 gene is located on the short (p) arm of chromosome 9 at position 13.3.

More precisely, the DNAI1 gene is located from base pair 34,458,752 to base pair 34,520,989 on chromosome 9.

See How do geneticists indicate the location of a gene? in the Handbook.

Where can I find additional information about DNAI1?

You and your healthcare professional may find the following resources about DNAI1 helpful.

You may also be interested in these resources, which are designed for genetics professionals and researchers.

What other names do people use for the DNAI1 gene or gene products?

  • axonemal dynein intermediate chain 1
  • CILD1
  • DIC1
  • dynein, axonemal, intermediate polypeptide 1
  • dynein intermediate chain 1, axonemal
  • dynein intermediate chain DNAI1
  • IC78
  • ICS1
  • immotile cilia syndrome 1
  • MGC26204

Where can I find general information about genes?

The Handbook provides basic information about genetics in clear language.

These links provide additional genetics resources that may be useful.

What glossary definitions help with understanding DNAI1?

axoneme ; cell ; dyskinesia ; gene ; heterotaxy ; infertility ; protein ; respiratory ; subunit ; syndrome

You may find definitions for these and many other terms in the Genetics Home Reference Glossary.

See also Understanding Medical Terminology.

References (9 links)


The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? in the Handbook.

Reviewed: April 2014
Published: February 8, 2016