Mga River

Coordinates: 59°48′44″N 30°54′7″E / 59.81222°N 30.90194°E / 59.81222; 30.90194

The Mga (Russian: Мга) is a river in Kirovsky and Tosnensky Districts of Leningrad Oblast in northwestern Russia. Mga is a left tributary of Neva River. The urban-type settlements of Mga and Pavlovo are located on the river. The length of the Mga is 93 kilometres (58 mi), and the area of its basin is 754 square kilometres (291 sq mi). The principal tributaries of the Mga are the Beryozovka (right) and the Voytolovka (left).

The source of the Mga is in the swamps in the southeastern part of Kirovsky District, south of the settlement of Naziya. The river flows southwest, reaches the border between Kirovsky and Tosnensky Districts, turns northwest, and a stretch of it forms the district border. North of the village of Yerzunovo the Mga leaves the district border and returns to Kirovsky District. The river passes the urban-type settlement of Mga and has its mouth in the eastern part of the urban-type settlement of Pavlovo.

Mga

Mga (Russian: Мга) is an urban locality (an urban-type settlement) in Kirovsky District of Leningrad Oblast, Russia. Population: 10,212 (2010 Census); 9,613 (2002 Census); 9,852 (1989 Census).

The name is almost certainly derived from the identically named Mga River on which it lies (which in turn is probably of Finno-Ugric origin); the suggestion that it comes from the initials of the owner of the land in the 19th century, Maria Grigorievna Apraksin (a member of the same family for which the Apraksin Dvor in St. Petersburg is named), is extremely unlikely.

History

The settlement was founded in the beginning of the 20th century to serve the railway station. It was a part of Saint Petersburgsky Uyezd of Saint Petersburg Governorate. In 1914, Saint Peterburgsky Uyezd was renamed Petrogradsky Uyezd. On February 14, 1923 Shlisselburgsky Uyezd was merged into Petrogradsky Uyezd. In January, 1924 the uyezd was renamed Leningradsky. Saint Petersburg Governorate was twice renamed, to Petrograd Governorate and subsequently to Leningrad Governorate.

MGA

MGA can be an abbreviation of:

Mga (protein)

Mga is a DNA-binding protein that activates the expression of several important virulence genes in Streptococcus pyogenes (group A Streptococcus, GAS) in response to changing environmental conditions. The family also contains VirR like proteins which match only at the C-terminus.

Mga is a wide-reaching regulator, affecting gene expression in over 10% of the S. pyrogenes genome. The other large regulator of virulence in GAS is the CovR/S two-component system, which affects the expression of approximately 15% of the genome. The two systems are linked through another protein, RivR, and a small non-coding RNA RivX.

References

This article incorporates text from the public domain Pfam and InterPro IPR007737