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RPSA gene

ribosomal protein SA

Normal Function

The RPSA gene provides instructions for making a protein called ribosomal protein SA, which is one of approximately 80 different ribosomal proteins. These proteins come together to form structures called ribosomes. Ribosomes process the cell's genetic instructions to create proteins.

Each ribosome is made up of two parts (subunits) called the large subunit and the small subunit. Ribosomal protein SA is part of the small subunit.

The specific roles of each of the ribosomal proteins within the ribosome are not entirely understood. Some ribosomal proteins are involved in the assembly or stability of ribosomes. Others help carry out the ribosome's main function of building new proteins. Research suggests that ribosomal protein SA helps the ribosome control the production of certain proteins, many of which are likely important for development before birth.

Health Conditions Related to Genetic Changes

Isolated congenital asplenia

At least 20 RPSA gene mutations have been identified in individuals with isolated congenital asplenia. People with this condition do not have a spleen but have no other developmental abnormalities. The spleen plays an important role in the immune system. Without this organ, affected individuals are highly susceptible to bacterial infections, which can be life-threatening.

RPSA gene mutations are thought to reduce the amount of functional ribosomal protein SA. A shortage of the normal protein likely impairs the assembly of ribosomes, but the specific effects of the mutations are not known. It is unclear why RPSA gene mutations solely affect the development of the spleen.

More About This Health Condition

Other Names for This Gene

  • 40S Ribosomal Protein SA
  • Laminin Receptor
  • laminin receptor 1, human
  • Laminin Receptor-1
  • LAMR1
  • Lamr1 protein, human
  • Ribosomal Protein SA Gene
  • RPSA Gene

Additional Information & Resources

Tests Listed in the Genetic Testing Registry

Scientific Articles on PubMed

Catalog of Genes and Diseases from OMIM

Gene and Variant Databases


  • Bolze A, Boisson B, Bosch B, Antipenko A, Bouaziz M, Sackstein P, Chaker-Margot M, Barlogis V, Briggs T, Colino E, Elmore AC, Fischer A, Genel F, Hewlett A, Jedidi M, Kelecic J, Kruger R, Ku CL, Kumararatne D, Lefevre-Utile A, Loughlin S, Mahlaoui N, Markus S, Garcia JM, Nizon M, Oleastro M, Pac M, Picard C, Pollard AJ, Rodriguez-Gallego C, Thomas C, Von Bernuth H, Worth A, Meyts I, Risolino M, Selleri L, Puel A, Klinge S, Abel L, Casanova JL. Incomplete penetrance for isolated congenital asplenia in humans with mutations in translated and untranslated RPSA exons. Proc Natl Acad Sci U S A. 2018 Aug 21;115(34):E8007-E8016. doi: 10.1073/pnas.1805437115. Epub 2018 Aug 2. Citation on PubMed or Free article on PubMed Central
  • Bolze A, Mahlaoui N, Byun M, Turner B, Trede N, Ellis SR, Abhyankar A, Itan Y, Patin E, Brebner S, Sackstein P, Puel A, Picard C, Abel L, Quintana-Murci L, Faust SN, Williams AP, Baretto R, Duddridge M, Kini U, Pollard AJ, Gaud C, Frange P, Orbach D, Emile JF, Stephan JL, Sorensen R, Plebani A, Hammarstrom L, Conley ME, Selleri L, Casanova JL. Ribosomal protein SA haploinsufficiency in humans with isolated congenital asplenia. Science. 2013 May 24;340(6135):976-8. doi: 10.1126/science.1234864. Epub 2013 Apr 11. Citation on PubMed or Free article on PubMed Central
  • Mahlaoui N, Minard-Colin V, Picard C, Bolze A, Ku CL, Tournilhac O, Gilbert-Dussardier B, Pautard B, Durand P, Devictor D, Lachassinne E, Guillois B, Morin M, Gouraud F, Valensi F, Fischer A, Puel A, Abel L, Bonnet D, Casanova JL. Isolated congenital asplenia: a French nationwide retrospective survey of 20 cases. J Pediatr. 2011 Jan;158(1):142-8, 148.e1. doi: 10.1016/j.jpeds.2010.07.027. Epub 2010 Sep 16. Citation on PubMed

The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.