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Genetics Home Reference: your guide to understanding genetic conditions     A service of the U.S. National Library of Medicine®


Reviewed June 2009

What is the official name of the EFEMP2 gene?

The official name of this gene is “EGF containing fibulin-like extracellular matrix protein 2.”

EFEMP2 is the gene's official symbol. The EFEMP2 gene is also known by other names, listed below.

What is the normal function of the EFEMP2 gene?

The EFEMP2 gene provides instructions for making a protein called EGF-containing fibulin-like extracellular matrix protein 2, which is also known as fibulin-4. This protein is part of a group of proteins called fibulins. Fibulins have a variety of functions in the extracellular matrix, which is the intricate lattice of proteins and other molecules that forms in the spaces between cells.

Little is known about the function of fibulin-4 in the extracellular matrix. It appears to play a critical role in the assembly of elastic fibers, which are slender bundles of protein that provide strength and flexibility to connective tissue (tissue that supports the body's joints and organs). Fibulin-4 is found in tissues and organs that are rich in elastic fibers, including the blood vessels, heart valves, lungs, and skin.

How are changes in the EFEMP2 gene related to health conditions?

cutis laxa - caused by mutations in the EFEMP2 gene

At least three mutations in the EFEMP2 gene have been identified in people with cutis laxa. EFEMP2 mutations cause a form of the disorder called autosomal recessive cutis laxa type I, which is characterized by loose and sagging skin, a lung disease called emphysema, and severe abnormalities involving the heart and blood vessels.

Mutations in the EFEMP2 gene likely prevent cells from producing any functional fibulin-4. Without this protein, elastic fibers cannot be assembled normally in the extracellular matrix. A shortage of normal elastic fibers weakens connective tissue in the skin, blood vessels, lungs, and other organs. These defects in connective tissue underlie the major features of cutis laxa.

Where is the EFEMP2 gene located?

Cytogenetic Location: 11q13.1

Molecular Location on chromosome 11: base pairs 65,866,441 to 65,872,934

(Homo sapiens Annotation Release 107, GRCh38.p2) (NCBI (

The EFEMP2 gene is located on the long (q) arm of chromosome 11 at position 13.1.

The EFEMP2 gene is located on the long (q) arm of chromosome 11 at position 13.1.

More precisely, the EFEMP2 gene is located from base pair 65,866,441 to base pair 65,872,934 on chromosome 11.

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

Where can I find additional information about EFEMP2?

You and your healthcare professional may find the following resources about EFEMP2 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 EFEMP2 gene or gene products?

  • EGF-containing fibulin-like extracellular matrix protein 2
  • FBLN4
  • fibulin 4
  • fibulin-like extracellular matrix protein
  • MBP1
  • mutant p53 binding protein 1
  • UPH1

See How are genetic conditions and genes named? ( in the Handbook.

What glossary definitions help with understanding EFEMP2?

autosomal ; autosomal recessive ; connective tissue ; elastic ; emphysema ; extracellular ; extracellular matrix ; gene ; protein ; recessive ; tissue

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


  • Dasouki M, Markova D, Garola R, Sasaki T, Charbonneau NL, Sakai LY, Chu ML. Compound heterozygous mutations in fibulin-4 causing neonatal lethal pulmonary artery occlusion, aortic aneurysm, arachnodactyly, and mild cutis laxa. Am J Med Genet A. 2007 Nov 15;143A(22):2635-41. (
  • Giltay R, Timpl R, Kostka G. Sequence, recombinant expression and tissue localization of two novel extracellular matrix proteins, fibulin-3 and fibulin-4. Matrix Biol. 1999 Oct;18(5):469-80. (
  • Hucthagowder V, Sausgruber N, Kim KH, Angle B, Marmorstein LY, Urban Z. Fibulin-4: a novel gene for an autosomal recessive cutis laxa syndrome. Am J Hum Genet. 2006 Jun;78(6):1075-80. Epub 2006 Apr 10. (
  • Kielty CM. Elastic fibres in health and disease. Expert Rev Mol Med. 2006 Aug 8;8(19):1-23. Review. (
  • Kobayashi N, Kostka G, Garbe JH, Keene DR, Bächinger HP, Hanisch FG, Markova D, Tsuda T, Timpl R, Chu ML, Sasaki T. A comparative analysis of the fibulin protein family. Biochemical characterization, binding interactions, and tissue localization. J Biol Chem. 2007 Apr 20;282(16):11805-16. Epub 2007 Feb 26. (
  • NCBI Gene (
  • Timpl R, Sasaki T, Kostka G, Chu ML. Fibulins: a versatile family of extracellular matrix proteins. Nat Rev Mol Cell Biol. 2003 Jun;4(6):479-89. Review. (


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: June 2009
Published: February 8, 2016