On Motif Statistics in Protein Spatial Networks

نویسنده

  • Blake Stacey
چکیده

In recent years, networks derived from complex systems have been studied not just in terms of global properties like degree distributions, but also in terms of motifs, small subgraphs whose appearances can be examined statistically. Motifs which occur more often than chance predicts are often presumed to indicate some feature of local structure which is preferred for biological, physical or geometrical reasons. We test a claim made in R. Milo et al., Science 303 (5 March 2004) to the effect that protein structures can be approached in this way, studying not three proteins but a set of 830. Overall, the general claim of the earlier paper is borne out: the spatial distribution of secondary-structure elements can be roughly understood as a geometrically constrained network. Structures of individual proteins are reflected in the clustering coefficients of the networks derived from the protein geometries. The investigation of a network growth model based on geometric constraints reveals a conceptual link with entropyestimation techniques invented for high-energy physics.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

In Silico Analysis of Primary Sequence and Tertiary Structure of Lepidium Draba Peroxidase

Peroxidase enzymes are vastly applicable in industry and diagnosiss. Recently, we introduced a new kind of peroxidase gene from Lepidium draba (LDP). According to protein multiple sequence alignment results, LDP had 93% similarity and 88.96% identity with horseradish peroxidase C1A (HRP C1A). In the current study we employed in silico tools to determine, to which group of peroxidase enzymes LDP...

متن کامل

Expression Analysis of RNA-Binding Motif Gene on Y Chromosome (RBMY) Protein Isoforms in Testis Tissue and a Testicular Germ Cell Cancer-Derived Cell Line (NT2)

a key factor in spermatogenesis and disorders associated with this protein have been recognized to be related to male infertility. Although it was suggested that this protein could have different functions during germ cell development, no studies have been conducted to uncover the mechanism of this potential function yet. Here, we analyzed the expression pattern of RBMY protein isoforms in test...

متن کامل

Predicting SUMOylation Sites

Recent evidence suggests that SUMOylation of proteins plays a key regulatory role in the assembly and dis-assembly of nuclear subcompartments, and may repress transcription by modifying chromatin. Determining whether a protein contains a SUMOylation site or not thus provides essential clues about a substrate’s intra-nuclear spatial association and function. Previous SUMOylation predictors are l...

متن کامل

Minfer: Inferring Motif Statistics From Sampled Edges

Characterizing motif (i.e., locally connected subgraph patterns) statistics is important for understanding complex networks such as online social networks and communication networks. Previous work made the strong assumption that the graph topology of interest is known, and that the dataset either fits into main memory or is stored on disk such that it is not expensive to obtain all neighbors of...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007