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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Site-restricted plasminogen activation mediated by group A streptococcal streptokinase variants.
|
|---|---|
| Published in |
Biochemical Journal, January 2014
|
| DOI | 10.1042/bj20131305 |
| Pubmed ID | |
| Authors |
Simon M Cook, Amanda Skora, Mark J Walker, Martina L Sanderson-Smith, Jason D McArthur |
| Abstract |
SK (streptokinase) is a secreted plasminogen activator and virulence factor of GAS (group A Streptococcus). Among GAS isolates, SK gene sequences are polymorphic and are grouped into two sequence clusters (cluster type-1 and cluster type-2) with cluster type-2 being further classified into subclusters (type-2a and type-2b). In the present study, we examined the role of bacterial and host-derived cofactors in SK-mediated plasminogen activation. All SK variants, apart from type-2b, can form an activator complex with Glu-Plg (Glu-plasminogen). Specific ligand-binding-induced conformational changes in Glu-Plg mediated by fibrinogen, PAM (plasminogen-binding group A streptococcal M protein), fibrinogen fragment D or fibrin, were required for type-2b SK to form a functional activator complex with Glu-Plg. In contrast with type-1 and type-2a SK, type-2b SK activator complexes were inhibited by α2-antiplasmin unless bound to fibrin or to the GAS cell-surface via PAM in combination with fibrinogen. Taken together, these data suggest that type-2b SK plasminogen activation may be restricted to specific microenvironments within the host such as fibrin deposits or the bacterial cell surface through the action of α2-antiplasmin. We conclude that phenotypic SK variation functionally underpins a pathogenic mechanism whereby SK variants differentially focus plasminogen activation, leading to specific niche adaption within the host. |
X Demographics
The data shown below were collected from the profiles of 2 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 1 | 50% |
| Unknown | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 2 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 10 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 10% |
| Unknown | 9 | 90% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 3 | 30% |
| Researcher | 2 | 20% |
| Student > Bachelor | 1 | 10% |
| Student > Master | 1 | 10% |
| Unknown | 3 | 30% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 4 | 40% |
| Biochemistry, Genetics and Molecular Biology | 1 | 10% |
| Pharmacology, Toxicology and Pharmaceutical Science | 1 | 10% |
| Unknown | 4 | 40% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 23 January 2014.
All research outputs
#14,182,545
of 22,731,677 outputs
Outputs from Biochemical Journal
#9,646
of 11,408 outputs
Outputs of similar age
#172,024
of 305,436 outputs
Outputs of similar age from Biochemical Journal
#38
of 95 outputs
Altmetric has tracked 22,731,677 research outputs across all sources so far. This one is in the 35th percentile – i.e., 35% of other outputs scored the same or lower than it.
So far Altmetric has tracked 11,408 research outputs from this source. They receive a mean Attention Score of 4.6. This one is in the 13th percentile – i.e., 13% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 305,436 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 41st percentile – i.e., 41% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 95 others from the same source and published within six weeks on either side of this one. This one is in the 34th percentile – i.e., 34% of its contemporaries scored the same or lower than it.