ArticleInfection and immunity1993
Cysteine-dependent zinc binding by membrane proteins of Giardia lamblia.
Article in Infection and immunity, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
7 citing papers in PubMed, 36 citations in OpenAlex.
- Efficient oral vaccination by bioengineering virus-like particles with protozoan surface proteins.Nature communications · 2019Article
- Review
- Article
- Immune response to Giardia duodenalis.Clinical microbiology reviews · 2000Review
- Efficacies of zinc-finger-active drugs against Giardia lamblia.Antimicrobial agents and chemotherapy · 1998Article
- Antigenic variation in Giardia lamblia and the host's immune response.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 1997Review
- Variant-specific surface proteins of Giardia lamblia are zinc-binding proteins.Proceedings of the National Academy of Sciences of the United States of America · 1993Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
The abundant, highly variable surface proteins (VSPs) which cover the surface of Giardia lamblia trophozoites compose a group of extremely cysteine (C)-rich proteins in which more than half of the cysteines are in the motif CXXC. Because of the constancy of these features among the known VSPs and the prominence of cysteine and particularly CXXC in proteins that bind zinc and other metals, we asked whether G. lamblia VSPs bind zinc in vitro. VSPs are the major protein component of Triton X-114 detergent-phase extracts of G. lamblia trophozoites and can be readily identified by surface iodination of intact cells. The partitioning of 65Zn binding into the Triton X-114 detergent phase and the correspondence between surface iodination and zinc binding patterns of four G. lamblia strains or sublines with different VSPs support the idea that VSPs bind zinc. The requirement for renaturation of blots with a reducing agent indicates that Zn2+ is coordinated by cysteine residues, rather than by other amino acids. Binding did not appear to be specific to zinc since it was inhibited by competition with other divalent metal ions. The abundance of the VSPs and the prevalence of metal binding motifs among all known variants suggest that they may play an important role in trophozoite survival and colonization in the host.
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Registered trials
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