The gamma-hemolysin locus of Staphylococcus aureus comprises three linked genes, two of which are identical to the genes for the F and S components of leukocidin.
نویسندگان
چکیده
The Staphylococcus aureus gamma-hemolysin comprises two polypeptides, whereas the gamma-hemolysin locus (hlg) contains three open reading frames. The hlgA and hlgB genes encode the gamma 1 and gamma 2 components, respectively. The HlgB protein (gamma 2) has 27% residue identity with S. aureus alpha-toxin. Surprisingly, hlgB and hlgC are 98.5 and 99.1% identical to the lukF and lukS genes, respectively, encoding the F and S components of the Panton-Valentine leukocidin.
منابع مشابه
Cbmmunication Gamma - Hemolysin Genes in the Same Family with LukF and inkS Genes in Methici - n
7-hemolysin, consist of two protein component, i.e,, F and S fbr leukocidin and H7I and H7II fbr 7-hemolysin, We have reported the cloning and sequencing of the leukocidin genes lukS and inkF from MRSA No. 4,2'3) In a previous report4) we purified both H7I and Hvll components to hornogeneity from S. aureus, compared their properties with those of the F and S components of leukocidin, and sugges...
متن کاملBiofilm Formation and Detection of IcaAB Genes in Clinical Isolates of Methicillin Resistant Staphylococcus aureus
Objective(s) Methicillin-resistant Staphylococcus aureus (MRSA) is an important cause of nosocomial and community infections. Biofilm formation, mediated by a polysaccharide intercellular adhesin (PIA) and encoded by the ica operon, is considered to be an important virulence factor in both S. epidermidis and S. aureus. However, the clinical impact of the ica locus and PIA production is less w...
متن کاملAssociation of agr Gene Expression with Staphylococcus Aureus Virulence Genes in BHI Broth
Abstract Background and Objective: Agr is the most important regulatory system for the expression of Staphylococcus aureus virulence factors in different conditions. Agr acts as a quorum sensing system in this bacterium which is activated by increased cell concentration during the transition from logarithmic growth phase to stationary phase. Its role is to up...
متن کاملشناسایی ژنهای حدت پنتون والنتین لوکوسیدین (PVL) و مقاومت به متیسیلین (mecA ) در استافیلوکوکوس اورئوس جدا شده از نمونههای بالینی: یک گزارش کوتاه
Background and Objective: Staphylococcus aureus is a major pathogen of human in the world. Methicillin-resistant Staphylococcus aureus is associated with nosocomial infections. Recently, staphylococcal infections have been associated with the community. The purpose of this study was to isolate and identify Staphylococcus aureus virulence Panton-Valentine leukocidin (PVL) and methicillin...
متن کاملSequencing of leucocidin R from Staphylococcus aureus P83 suggests that staphylococcal leucocidins and gamma-hemolysin are members of a single, two-component family of toxins.
A 2,813-bp HincII-ClaI DNA fragment encodes the two S and F components (LukS-R and LukF-R) of leucocidin R (Luk-R) which are secreted by Staphylococcus aureus P83. The two genes (lukS-R and lukF-R) belong to a single operon. Two peptidic sequences were deduced: LukS-R is a 35,721-Da polypeptide of 315 amino acids, including a signal sequence of 29 residues, and LukF-R is a 36,838-Da polypeptide...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Infection and immunity
دوره 61 2 شماره
صفحات -
تاریخ انتشار 1993