MBL2 R52C - GET-Evidence

Note: This variant has not been sufficiently evaluated by a GET-Evidence editor.

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(MBL2 Arg52Cys)

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Short summary

This variant is associated with mannose binding protein deficiency which leads to impaired complement system immune response to mannose-rich pathogens. The wild-type version of this gene is known as variant allele A, while this is called variant allele D. See G54D (variant B) and G57E (variant C).

Variant evidence
Computational 2

Other mutations in the gene are associated with mannose binding protein deficiency, NBLOSUM = 5.

See unpublished research (below).

Functional -
Case/Control 1

OR = 3.03, significance = 0.096

See unpublished research (below).

Familial -
Clinical importance
Severity -
Treatability -
Penetrance -


Insufficiently evaluated pathogenic

(The "insufficiently evaluated" qualifier is assigned automatically based on the above evidence and importance scores.)

Inheritance pattern


Summary of published research, and additional commentary


Total cases/controls case+ case– control+ control– p-value odds ratio
Mannose-Binding Lectin Deficiency
6 95 0 47 0.1772


Allele frequency

  • A @ chr10:54531242: 4.9% (523/10758) in EVS
  • A @ chr10:54201247: 4.0% (5/126) in GET-Evidence
  • Frequency shown in summary reports: 4.9% (523/10758)


Garred P, Madsen HO, Hofmann B, Svejgaard A. Increased frequency of homozygosity of abnormal mannan-binding-protein alleles in patients with suspected immunodeficiency. Lancet. 1995 Oct 7;346(8980):941-3. PubMed PMID: 7564730.

A study of patients with suspected immunodeficiency found a higher number of homozygous and compound heterozygous patients with abnormal mannan-binding protein (MBP) alleles (variants B, C, and D). In the case group of 101 patients, one patient was homozygous for D and five were compound heterozygous for B/D. No patients in the control population of 47 patients were homozygous or compound heterozygous.

Cases/controls case+ case– control+ control– p-value odds ratio
Mannose-Binding Lectin Deficiency
6 95 0 47 0.1772


Hibberd ML, Sumiya M, Summerfield JA, Booy R, Levin M. Association of variants of the gene for mannose-binding lectin with susceptibility to meningococcal disease. Meningococcal Research Group. Lancet. 1999 Mar 27;353(9158):1049-53. PubMed PMID: 10199352.

A study of the frequency of MBL2 variants was made comparing children meningococcal disease with controls. Of 266 patients, none were homozygous for R52C and 12 were compound heterozygous for R52C and either G54D or G57E. Of 382 controls, 3 were compound heterozygous for R52C.


hu04FD18 - CGI sample GS00253-DNA_F01_200_37
het A @ chr10:54531242




Other external references

  • rs5030737
  • Score: 0.999 (probably damaging)

Other in silico analyses

  • NBLOSUM100 score = 8
  • GET-Evidence autoscore = 5

Edit history

Gene search

"GENE" or "GENE A123C":

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