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Label-free proteomic strategy to compare the proteomic differences of Inner Mongolian cashmere goat during intramuscular fat anabolism and catabolism

ABSTRACT: Background: Inner Mongolia is a major raw-cashmere-producing province in China, Inner Mongolia cashmere goat harbors three types —Erlangshan, Aerbasi and Alashan. Nearly 700,000 Aerbasi cashmere goats are fed per year, and meat production is nearly 10,000 tons. However, there are no reports on the meat of this goat. To better understand the molecular variations underlying intramuscular fat (IMF) anabolism and catabolism in Inner Mongolian cashmere goat, the proteomic differences between the biceps femoris (BF) and longissimus dorsi (LD) were investigated by label-free strategy. Then, the proteins were verified by western blot analysis as being involved in IMF anabolism and catabolism. Results: The IMF content was significantly higher in the BF than in the LD, suggesting that IMF is accumulated more in the BF or metabolized more in the LD. We performed proteomic analysis of IMF anabolism and catabolism at the proteomic level, and 1209 proteins were identified in the BF (high-IMF) and LD (low-IMF) groups, with 993 and 896 proteins in each group. Among them, 110 were differentially expressed proteins (DEPs). Gene ontology (GO) classification statistics showed that the 110 DEPs were functionally classified into 100 annotation clusters. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that three pathways were related to IMF metabolism and deposition—fatty acid metabolism, fatty acid degradation and fatty acid elongation—and included 7 proteins. Conclusion: GO and KEGG analyses showed that differentially expressed HADHA, HADHB, ACSL1, ACADS, ACAT1 and ACAA2 in the mitochondrion act via fatty acid metabolism, fatty acid degradation and fatty acid elongation to influence the metabolism and synthesis of long-, short- and medium-chain fatty acids and influence IMF anabolism and catabolism. Protein-protein interaction (PPI) network analysis showed that IMF accumulation in different muscle tissues of Aerbasi cashmere goat was affected by not only 5 key enzymes or proteins involved in fatty acid synthesis and metabolism but also 5 DEPs (SUCLG1, SUCLG2, CS, DLST, ACO2) in the TCA cycle. Our results provide new insights into IMF deposition in goat and improve our understanding of the molecular mechanisms underlying IMF anabolism and catabolism.

ORGANISM(S): Capra Hircus

SUBMITTER: Jinquan Li

PROVIDER: PXD022901 | iProX | Fri Dec 04 00:00:00 GMT 2020

REPOSITORIES: iProX

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Project description:The domestic goat, Capra hircus (2n=60), is one of the most important domestic livestock species in the world. Here we report its high quality reference genome generated by combining Illumina short reads sequencing and a new automated and high throughput whole genome mapping system based on the optical mapping technology which was used to generate extremely long super-scaffolds. The N50 size of contigs, scaffolds, and super-scaffolds for the sequence assembly reported herein are 18.7 kb, 3.06 Mb, and 18.2 Mb, respectively. Almost 95% of the supper-scaffolds are anchored on chromosomes based on conserved syntenic information with cattle. The assembly is strongly supported by the RH map of goat chromosome 1. We annotated 22,175 protein-coding genes, most of which are recovered by RNA-seq data of ten tissues. Rapidly evolving genes and gene families are enriched in metabolism and immune systems, consistent with the fact that the goat is one of the most adaptable and geographically widespread livestock species. Comparative transcriptomic analysis of the primary and secondary follicles of a cashmere goat revealed 51 genes that were significantly differentially expressed between the two types of hair follicles. This study not only provides a high quality reference genome for an important livestock species, but also shows that the new automated optical mapping technology can be used in a de novo assembly of large genomes. Corresponding whole genome sequencing is available in NCBI BioProject PRJNA158393. We have sequenced a 3-year-old female Yunnan black goat and constructed a reference sequence for this breed. In order to improve quality of gene models, RNA samples of ten tissues (Bladder, Brain, Heart, Kidney, Liver, Lung, Lymph, Muscle, Ovarian, Spleen) were extracted from the same goat which was sequenced. To investigate the genic basis underlying the development of cashmere fibers using the goat reference genome assembly and annotated genes, we extracted RNA samples of primary hair follicle and secondary hair follicle from three Inner Mongolia cashmere goats and conducted transcriptome sequencing and DGE analysis. This submission represents RNA-Seq component of study.

Project description:The domestic goat, Capra hircus (2n=60), is one of the most important domestic livestock species in the world. Here we report its high quality reference genome generated by combining Illumina short reads sequencing and a new automated and high throughput whole genome mapping system based on the optical mapping technology which was used to generate extremely long super-scaffolds. The N50 size of contigs, scaffolds, and super-scaffolds for the sequence assembly reported herein are 18.7 kb, 3.06 Mb, and 18.2 Mb, respectively. Almost 95% of the supper-scaffolds are anchored on chromosomes based on conserved syntenic information with cattle. The assembly is strongly supported by the RH map of goat chromosome 1. We annotated 22,175 protein-coding genes, most of which are recovered by RNA-seq data of ten tissues. Rapidly evolving genes and gene families are enriched in metabolism and immune systems, consistent with the fact that the goat is one of the most adaptable and geographically widespread livestock species. Comparative transcriptomic analysis of the primary and secondary follicles of a cashmere goat revealed 51 genes that were significantly differentially expressed between the two types of hair follicles. This study not only provides a high quality reference genome for an important livestock species, but also shows that the new automated optical mapping technology can be used in a de novo assembly of large genomes. We have sequenced a 3-year-old female Yunnan black goat and constructed a reference sequence for this breed. In order to improve quality of gene models, RNA samples of ten tissues(Bladder, Brain, Heart, Kidney, Liver, Lung, Lymph, Muscle, Ovarian, Spleen) were extracted from the same goat which was sequenced. To investigate the genic basis underlying the development of cashmere fibers using the goat reference genome assembly and annotated genes, we extracted RNA samples of primary hair follicle and secondary hair follicle from three Inner Mongolia cashmere goats and conducted transcriptome sequencing and DEG analysis. Corresponding whole genome sequencing is available in NCBI BioProject PRJNA158393.

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Label-free proteomic strategy to compare the proteomic differences of Inner Mongolian cashmere goat during intramuscular fat anabolism and catabolism

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