I subscribe to an Evolution mailing list, in which keeps me updated on post-doc openings, tips and tricks on the lab, as well as other miscellaneous information. Sometimes, someone asks an interesting question and others on the list contribute what they know. Lurkers like me read whatever that catches our interest. Like the following message. It's a rivetting read, (at least for a nerd like me) so I thought I'd share it on my blog.
I've kept the message in its original form, so that the proper people can be credited. Some editing done though, to make it flow better.
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Email by by Laurence D. Hurst (Professor of Evolutionary Genetics, University of Bath.)
"Many thanks to all who responded, and/or expressed an interest in, the naming of genes after characters from Greek mythology. I cannot claim that the list is exhaustive but as I am now finding it very difficult, through trawling, to come up with new examples, I guess there are probably not so many more. I should like to start by thanking all those who responded (in no particular order): Sarah Cohen, Dmitri Petrov, Jeffrey Marcus, Diana Wolf, Jennifer Gleason, Andy Gardner, Tom Gilbert, Joe Williams, Karl Schmid, Louise Johnson, Diane Ramos, Kristie Mather, David de Lorenzo, Irene Till, Sergios-Orestis Kolokotronis, Roman Arguello, Etienne Patin, Nicole Riddle, Colin Meiklejohn, Jacek Szymura, Chung-I Wu, Hope Hollocher, Jean-Marc Reichart and (my brother) Greg.
Let me commence the run down with the gene that stimulated the original question,
Medea, named after the woman who slayed her own children. A 'gene' called
Medea exists in the beetle
Tribolium (3). In this instance this is a selfish element that causes death of embryos not containing
Medea via a maternal effect. So if a mother is heterozygous (+/-) and mates with a -/- father, the +/- progeny survive but the -/- ones die. The offspring killing activity is necessary for the spread of the + allele. In the case of the condition in
Tribolium I called it a ?gene? as many selfish elements of this type are two loci in very tight linkage hence behaving effectively as one segregating type (allele). The
Tribolium case I suspect was named in part by mythological reference but it is also a convenient acronym:
Maternal-Effect Dominant Embryonic Arrest. There is also a
Medea gene in
Arabidopsis around which a mini-industry of naming after Greek myth has developed. It was rather embarrassing that I forgot about this as one of the workers in this field is all but 50 metres down my corridor
(Rod Scott here in Bath).
ArabidopsisIn the case of the gene in weed, a mutant version of the
Medea genes acts possibly via imprinting or as a maternal effect to cause embryo mortality (1, 2). As a mutant copy from the father has no effect, the effect is specifically maternal killing of offspring, hence the
Medea reference. Moving upstream, the gene
Demeter in
Arabidopsis is a regulator of
Medea (4).
Demeter in Greek myth brings forth the fruits of the earth, in particular she was the goddess of fertility and the growth of vegetation, protector of the earth and its resources, mother of cereals (where she gains her name from the Greek word "dimitriaka") and primarily of grains. As the gene is necessary for seed develoment it seems very appropriate.
Medea and
Demeter are connected in myth as
Medea's arrival in Corinth had saved citizens from starvation, by sacrificing to
Demeter and repeatedly appeasing the goddess. The gene
Medea in turn regulates
Pheres1(5, 6),
Pheres being one of the two children killed by
Medea. Like
Medea in
Tribolium,
Artemis (7) in weed seems to derive its name also, at least in part, as an acronym:
Arabidopsis Thaliana Envelope Membrane Integrase. If the myth was in the minds of the authors I couldn?t find any reference to the logic. From weed I have found one further putative connection, the gene
Argonaute. The gene was named by reference to the squid-like appearance of the leaves of
Arabidopsis mutants lacking AGO1 gene function(8). In this case the Greek connection seems to be one step removed. The scientific name of the paper nautilus, especially the largest species,
Argonauta argo, is of mythical Greek origin. The argonauts were a group of Greek heroes that, led by Jason, travelled to Kolchis to gain the golden fleece. They were called that way, because their ship was the Argo. In Greek argonaut means "who travels on the Argo". The squid's discoverers probably mistook it's sail-like flaps as a locomotive organ and thus drew the similarity to the mythical Argo. So the
Argonaute gene looks to have no direct connection to myth, just to squid-like appearance.
FliesDespite this flurry in Arabidopsis, it seems, however, that the Drosophilists are most well acquainted with Greek myth. So far I have found 15 namings from Greek mythology. First there is the speciation gene
Odysseus (9). Odysseus ordered the making of the Trojan Horse and rode inside along with other warriors.
Chung-I Wu kindly explained that: "
The reason [for the naming] was somewhat silly. We were looking for something that could wreak havoc in a foreign territory. Odysseus hiding in a wooden horse is like the gene embedded in the introgression; the result was devastating."Carrying on with the Odysseus connection, many of the Greek inspired names in flies are transposable elements. Some have expressed the opinion that this all started with
D. virilis transposable elements being named after characters from the
Odysseus (Ulysses, Penelope, Helena, Paris). The first one was
Ulysses (11, 12) (a traveller's name is appropriate for a transposable element) and then the co-mobilized TEs were given names that were somehow related to Ulysses. Naming transposeable elements in flies after Greek mythological characters is now very common: see
Circe and
Hercules,
Minos and
Hermes (the later first reported in
Musca domestica).
Moving off transposable elements, the
Persephone (10) gene encodes a serine protease in
Drosophila. It was given this name (Pr. Jean-Marc Reichhart pers comm.) because the mutation was found in a lethal suppressor screen. Just as the Greek godess was able to cross the Styx and take dead people to live again, the mutation allows dead necrotic flies to live.
Hades, alias Gram-negative bacteria binding protein 3, is involved in immune activity. The usage of the name Hades seems relatively rare (most appear to refer to GNBP3) but some do use the name (see e.g. (13)). I have as yet been unable to track down first usage or the reason for the name. Sorry.
Scylla and
charybde (14) (a. k. a. charybde) are paralogous genes identified as growth suppressors. The genes are named after mythological monsters said to have lived in the Strait of Messina between Sicily and Italy that endangered shipping. Quite why genes whose simultaneous loss results in flies that are more susceptible to reduced oxygen concentrations and that show mild overgrowth phenotypes, should be named after monsters I have yet to uncover.
Much clearer is the naming of
Ariadne this being a
Drosophila gene (15) necessary for nerve cell axons to reach their targets. Its human and mouse orthologs have been characterized. Ariadne, in Greek mythology, helped the Athenian prince, Theseus (Thisseas), son of Aegeas, to escape from the Cretan Labyrinth. She gave Theseus a ball of string which he attached to the entrance of the Labyrinth, so that he could find his way back out. The idea of something that helps something else find the way seems to be the connection here.
Last, but by no means least,
Sphinx (16) in
D. melanogaster is a new gene and a chimera of two others. The name was chosen (16) to invoke an analogy to another chimera, the Sphinx from ancient Greek legend having a lion's body and a human head.
Mammals
By contrast to the fly world mammalian gene only rarely get named after Greek myths (or at least the trawl found only a few). The gene
Klotho (17) is associated with premature aging in mice and variation in
klotho function contributes to heterogeneity in the onset and severity of human age-related phenotypes. Klotho was one of the three Greek Fates -- goddesses who in Greek mythology controlled a person's destiny and lfe. Klotho, whose name means "spinner", spun the thread of life. Lachesis measured the thread and Atropos cut it.
A further case of a very deliberate reference comes in the case of the
Hephaesin gene named after Hephaestus, the Greek god of metal-working. He wove a net of iron, and ensnared the illicit lovers Ares and Aphrodite making love. Correspondingly
Hephaesin gene in mice facilitates transport of iron from the intestines into the body's circulatory system (18). When the gene is mutated iron cannot be transported to the blood, and iron-deficiency anemia occurs.
In the original email I noted
Callipyne in sheep but thought it unrelated to myth. Thanks to Sergios-Orestis Kolokotronis for putting me straight here:
callipyge does refer to Greek mythology, it is one of Aphrodite's surnames "Aphrodite Kallipyge", but I was right in that it does mean beautiful buttocks. The gene derives it name from the phenotype associated with overgrowth of buttocks (see e.g. (19, 20)).
Other taxaAside from mammals, flies and weeds the use of Greek myth seems to be relatively sparse. The gene
Cerberus (21), can induce ectopic heads in
Xenopus and so is named after the three-headed guard dog of Hades. Othologs are known in mice and humans, also referred to as
Cerberus (e.g. (22, 23)).
Caronte (24, 25) in chickens is a member of the
Cerberus family. This seems to be a strange case of the same gene being identified by three independent groups (see also (26)), two of the independently calling it
Caronte. According to the authors of one of the reports (24): "
We have named this gene Caronte (Car) after the mythological boatman who shuttles souls to the underworld, where the dog Cerberus dwells."
The other group specifies that they use the same logic (25). May be there was some collusion. Similarly in fish a putative ortholog of
caronte is known as
Charon(27). In fish the gene
Cyclops (28) is associated with cyclopedia, a condition which gets its named from the one-eyed monster.
Finally, from the world of molecular biology comes the
lambda Charon
phage (e.g. (29)). I have found claims that the naming is derived from the Greek:
"For a typical lambda phage vector, the insert usually must be at least 12 kb and not over about 20 kb. This size range makes lambda phage vectors particularly useful for genomic libraries (collections of phage containing all of a genome in 12-20 kb fragments). Lambda phage vectors of this sort are sometimes called Charon vectors, a reference to Greek mythology, in which the boatman Charon ferries the souls of the dead across the River Styx." From: http://www.colorado.edu/MCDB/MCDB2150Fall/notes00/L0015.html. I have been unable to track down first usage to confirm this, but it seems plausible.
Non-Greek mythThere are several genes derived from other non-Greek myths but here my list is much less exhaustive. For example, in
Arabidopsis there is a gene named after the Etruscan goddess of fertility Feronia (30). The gene disrupts the female gametophytic control of pollen tube reception.
From roman myth come the two paralagous genes named
janusA and
janusB in Drosophila, which were named because they are right next to another
gene (
Serendipity) but they face in the opposite direction from
Serendipity, so this is reminiscent of the two-faced roman god Janus. A third paralagous gene in this group is named
ocnus, after the grandson of Janus.
Moving east,
jingwei (31) comes from an ancient legend from china
(San Hai Jing). Jingwei, a daughter of Emperor Yande, first Chinese emperor 30000BC (
sic), tragically drowned while swimming in the East China Sea. Jingwei was then reincarnated as a beautiful bird that drops stones and wood into the sea in an attempt to fill it, thus preventing others from drowning."
Also from China comes
monkey-king (32) after a mythical monkey king in ancient China who could transform his hair into many offspring." From Egypt comes
Osiris and
Isis (33) again in flies.
Osiris was so called because the
Isis locus partially rescues the effects of trisomy of the region containing
Osiris."
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