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Rahmatalla SA, Arends D, Brockmann GA. Review: Genetic and protein variants of milk caseins in goats. Front Genet 2022; 13:995349. [PMID: 36568379 PMCID: PMC9768343 DOI: 10.3389/fgene.2022.995349] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 10/03/2022] [Indexed: 12/12/2022] Open
Abstract
The milk casein genes in goats, are highly polymorphic genes with numerous synonymous and non-synonymous mutations. So far, 20 protein variants have been reported in goats for alpha-S1-casein, eight for beta-casein, 14 for alpha-S2-casein, and 24 for kappa-casein. This review provides a comprehensive overview on identified milk casein protein variants in goat and non-coding DNA sequence variants with some affecting the expression of the casein genes. The high frequency of some casein protein variants in different goat breeds and geographical regions might reflect specific breeding goals with respect to milk processing characteristics, properties for human nutrition and health, or adaptation to the environment. Because protein names, alongside the discovery of protein variants, go through a historical process, we linked old protein names with new ones that reveal more genetic variability. The haplotypes across the cluster of the four genetically linked casein genes are recommended as a valuable genetic tool for discrimination between breeds, managing genetic diversity within and between goat populations, and breeding strategies. The enormous variation in the casein proteins and genes is crucial for producing milk and dairy products with different properties for human health and nutrition, and for genetic improvement depending on local breeding goals.
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Affiliation(s)
- Siham A. Rahmatalla
- Animal Breeding and Molecular Genetics, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Humboldt University of Berlin, Berlin, Germany,Department of Dairy Production, Faculty of Animal Production, University of Khartoum, Khartoum North, Sudan,*Correspondence: Siham A. Rahmatalla, ; Gudrun A. Brockmann,
| | - Danny Arends
- Animal Breeding and Molecular Genetics, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Humboldt University of Berlin, Berlin, Germany,Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, United Kingdom
| | - Gudrun A. Brockmann
- Animal Breeding and Molecular Genetics, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Humboldt University of Berlin, Berlin, Germany,*Correspondence: Siham A. Rahmatalla, ; Gudrun A. Brockmann,
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Chalbi S, Dettori ML, Djemali M, Vacca GM, Petretto E, Pazzola M, Bedhiaf-Romdhani S. Haplotype structure of MSTN, IGF1, and BMP2 genes in Tunisian goats (Capra hircus) and their association with morphometric traits. Trop Anim Health Prod 2022; 55:2. [PMID: 36474048 DOI: 10.1007/s11250-022-03403-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 11/16/2022] [Indexed: 12/12/2022]
Abstract
The aim of the present study was to evaluate variability and haplotype structure of twenty-eight single nucleotide polymorphisms (SNPs) at myostatin (MSTN), insulin-like growth factor 1 (IGF1), and bone morphogenetic protein 2 (BMP2) genes. Association between the polymorphic SNPs and morphometric traits was performed on a population of 263 Tunisian goats. The SNPs analyzed were all polymorphic (except one), and the three genes had different haplotype structures. Significant association of SNPs at MSTN with head length was highlighted in the Tunisian goats. The variability at IGF1 gene was associated with body length, ear length, tail length, and chest depth. For BMP2, significant association was revealed with chest depth. Significant association was also detected between linkage disequilibrium (LD) block 2 at IGF1 with body length. These findings might play a potential role in gene-assisted programs.
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Affiliation(s)
- Sarra Chalbi
- National Agronomic Institute of Tunisia, 43 Avenue Charles Nicolle, 1082, Tunis, Mahrajène, Tunisia.,Laboratoire Des Productions Animales Et Fourragères, Institut National de La Recherche Agronomique de Tunisie, Université de Carthage, Carthage, Tunisia
| | - Maria Luisa Dettori
- Dipartimento Di Medicina Veterinaria, Università Degli Studi Di Sassari, Sassari, Italy
| | - M'Naouer Djemali
- National Agronomic Institute of Tunisia, 43 Avenue Charles Nicolle, 1082, Tunis, Mahrajène, Tunisia
| | | | - Elena Petretto
- Dipartimento Di Medicina Veterinaria, Università Degli Studi Di Sassari, Sassari, Italy
| | - Michele Pazzola
- Dipartimento Di Medicina Veterinaria, Università Degli Studi Di Sassari, Sassari, Italy
| | - Sonia Bedhiaf-Romdhani
- Laboratoire Des Productions Animales Et Fourragères, Institut National de La Recherche Agronomique de Tunisie, Université de Carthage, Carthage, Tunisia.
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Baseline composition and microbial quality assessment of raw milk from small ruminants and Maghrebi camels in the oasis area of Tunisia. Trop Anim Health Prod 2022; 54:391. [DOI: 10.1007/s11250-022-03408-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 11/16/2022] [Indexed: 11/24/2022]
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Li X, Spencer GW, Ong L, Gras SL. Beta casein proteins – A comparison between caprine and bovine milk. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Khaldi Z, Nafti M, Jilani MT. Small ruminants milk from Tunisian oasis: physicochemical characteristics, mineral contents, and microbiological quality. Trop Anim Health Prod 2021; 54:1. [PMID: 34862933 DOI: 10.1007/s11250-021-03000-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 11/25/2021] [Indexed: 11/28/2022]
Abstract
Characteristics and quality aspects of milk from native ovine Queue Fine de l'Ouest (QFO) and the exotic D'man (DMN) breeds were investigated and compared with those of two subgroups of the local goat population Arbi and Serti. A total of 418 individual milk samples were collected from multiparous lactating animals reared in the continental oasis region of Tunisia. Samples were analyzed for physical parameters (pH, density, and acidity), chemical composition (dry matter, fat, protein, lactose, casein, ash, and casein/protein ratio), mineral concentrations (Ca, P, Na, K, and Ca/P) and microbiological features (total mesophilic aerobic bacteria (TMAB), total coliforms count (TCC), lactic acid bacteria (LAB), sulphite-reducing Clostridium (CSR), yeast and molds (Y/M), Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Salmonella) according to standard methods. The values obtained for physicochemical, mineral, and microbial parameters revealed noticeable differences in the milk of the four studied breeds. On the whole milk samples, the mean value of pH, density, and acidity in milk collected from sheep breeds appeared higher than in milk collected from goat subgroups. As for milk composition, results showed a remarkable disparity between studied breeds and clear superiority of sheep breeds compared to goat's subgroups in all chemical contents being studied (dry matter, fat, protein, lactose, casein, and ash). The differences are more important, especially for dry matter, fat, protein, and casein content, whereas casein/protein ratio distinguished goat's genotypes, and the highest one was obtained for Serti Subgroup. When comparing sheep versus goat's milk for macro-minerals, the current study indicated lower K and higher concentrations of Ca, P, and Na. The milk of QFO sheep, the richest in casein and protein, was expressed with significantly higher levels of calcium and phosphorus compared to the DMN sheep breed and the two goat subgroups. The microbiological examination evidenced that the milk of both species complies with standard criteria required by the Tunisian legislation on the hygiene of milk and dairy products. The microbial quality of ewe milk was higher than goat milk, based on LAB and Y/M, while goats produced milk with better quality referring to TMAB and TCC counts. No significant differences were found for Staphylococcus aureus and Escherichia coli between examined breeds. Got results highlighted the complete absence of the two dangerous pathogens Salmonella and CSR in all investigated samples of small ruminants' milk.
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Affiliation(s)
- Zahran Khaldi
- Department of Animal Production, Regional Center for Research in Oasis Agriculture, Institution of Agricultural Research and Higher Education, University of Carthage, Route Tozeur Km1, Degueche, Tunis, Tunisia.
| | - Mounir Nafti
- Department of Animal Production, Regional Center for Research in Oasis Agriculture, Institution of Agricultural Research and Higher Education, University of Carthage, Route Tozeur Km1, Degueche, Tunis, Tunisia
| | - Mohamed Tabarek Jilani
- Regional Public Health Laboratory of Tozeur, Ministry of Public Health, 2233, Bled El hadar, Tozeur, Tunisia
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Gautam D, Vats A, Verma M, Rout PK, Meena AS, Ali M, Deepika S, De S. Genetic variation in CSN3 exon 4 region of Indian goats and a new nomenclature of CSN3 variants. Anim Genet 2019; 50:191-192. [PMID: 30724371 DOI: 10.1111/age.12767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Devika Gautam
- Animal Genomics Lab, Animal Biotechnology Center, ICAR-National Dairy Research Institute (NDRI), Karnal, 132001, India
| | - Ashutosh Vats
- Animal Genomics Lab, Animal Biotechnology Center, ICAR-National Dairy Research Institute (NDRI), Karnal, 132001, India
| | - Mahima Verma
- ICAR- Central Institute for Research on Goats (CIRG), Farah, Makhdum, 281122, India
| | - Pramod Kumar Rout
- ICAR- Central Institute for Research on Goats (CIRG), Farah, Makhdum, 281122, India
| | - Amar Singh Meena
- ICAR-Central Sheep and Wool Research Institute (CSWRI), Avikanagar, 304501, India
| | - Murtaza Ali
- Animal Genomics Lab, Animal Biotechnology Center, ICAR-National Dairy Research Institute (NDRI), Karnal, 132001, India
| | - Sameni Deepika
- Animal Biochemistry Division, ICAR-National Dairy Research Institute (NDRI), Karnal, 132001, India
| | - Sachinandan De
- Animal Genomics Lab, Animal Biotechnology Center, ICAR-National Dairy Research Institute (NDRI), Karnal, 132001, India
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Mastrangelo S, Tolone M, Montalbano M, Tortorici L, Di Gerlando R, Sardina MT, Portolano B. Population genetic structure and milk production traits in Girgentana goat breed. ANIMAL PRODUCTION SCIENCE 2017. [DOI: 10.1071/an15431] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this work was to evaluate the genetic status of the Girgentana goat, an endangered breed from Sicily (Italy), using microsatellite markers. Furthermore, as the main purpose of the Girgentana breed is milk production, quantitative milk traits were investigated, including fatty acid profile. Molecular data from CSN1S1, CSN2, CSN1S2, and CSN3 casein genes were also used to infer haplotypes. A total of 264 individuals were collected. Samples of Maltese (n = 41) and Derivata di Siria (n = 33) goat breeds were also used to understand the genetic relationship among breeds. Test-day records for milk production were collected to determine daily milk yield, fat, protein, casein, lactose, and somatic cell count. Individual milk samples were also collected for fatty acid extraction. Wright’s statistics, gene flow, Nei genetic distance, factorial correspondence analysis, and Bayesian assignment test showed the existence of genetic variability and differentiation among breeds. The AMOVA results indicated that 89.96% of the total variance was partitioned within populations. The Girgentana breed appears to have a subdivided population, and has not experienced a recent bottleneck. A high variability in milk yield was observed. Mean morning milk yield was 1448 ± 404 g, with 4.30 ± 0.87% and 3.72 ± 0.44% of fat and protein percentages, respectively. The average somatic cell count found in Girgentana goat milk was higher than the threshold of 1 500 000 cells/mL advised in Europe for fresh milk. Gross milk and fatty acid composition were similar to that reported in the literature for other local goat breeds.
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Palmeri M, Mastrangelo S, Sardina MT, Portolano B. Genetic Variability atαs2-caseinGene inGirgentanaDairy Goat Breed. ITALIAN JOURNAL OF ANIMAL SCIENCE 2016. [DOI: 10.4081/ijas.2014.2997] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Variability of the caprine whey protein genes and their association with milk yield, composition and renneting properties in the Sarda breed. 1. The LALBA gene. J DAIRY RES 2015; 82:434-41. [PMID: 26304038 DOI: 10.1017/s0022029915000461] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The 5' flanking region and 3' UTR of the caprine LALBA gene were analysed by SSCP and sequencing. A total of nine SNPs were detected: three in the promoter region, two were synonymous coding SNPs at exon-1, and four SNPs were in exon-4, within the 3'UTR. The nucleotide changes located in the promoter region (c.-358T>C, c.-163G>A, c.-121T>G) were genotyped by SSCP in 263 Sarda goats to evaluate their possible effect on milk yield, composition and renneting properties. We observed an effect of the three SNPs on milk yield and lactose content. Genotypes TT and CT at c.-358T>C (P A (P C and c.-121T>G were part of transcription factors binding sites, potentially involved in modulating the LALBA gene expression. The LALBA genotype affected renneting properties (P < 0.001), as heterozygotes c.-358CT and c.-163GA were characterised by delayed rennet coagulation time and curd firming time and the lowest value of curd firmness. The present investigation increases the panel of SNPs and adds new information about the effects of the caprine LALBA gene polymorphism.
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The effect of cold acidified milk replacer on productive performance of suckling kids reared in an extensive farming system. Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2014.08.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vacca GM, Dettori ML, Piras G, Manca F, Paschino P, Pazzola M. Goat casein genotypes are associated with milk production traits in the Sarda breed. Anim Genet 2014; 45:723-31. [PMID: 24990661 DOI: 10.1111/age.12188] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2014] [Indexed: 11/26/2022]
Abstract
The aim of the current work was to analyze, in the Sarda breed goat, genetic polymorphism within the casein genes and to assess their influence on milk traits. Genetic variants at the CSN1S1, CSN2, CSN1S2 and CSN3 gene loci were investigated using PCR-based methods, cloning and sequencing. Strong alleles prevailed at the CSN1S1 gene locus and defective alleles also were revealed. Null alleles were evidenced at each calcium-sensitive gene locus. At the CSN3 gene locus, we observed a prevalence of the CSN3 A and B alleles; the occurrence of rare alleles such as CSN3 B'', C, C', D, E and M; and the CSN3 S allele (GenBank KF644565) described here for the first time in Capra hircus. Statistical analysis showed that all genes, except CSN3, significantly influenced milk traits. The CSN1S1 BB and AB genotypes were associated with the highest percentages of protein (4.41 and 4.40 respectively) and fat (5.26 and 5.34 respectively) (P < 0.001). A relevant finding was that CSN2 and CSN1S2 genotypes affected milk protein content and yield. The polymorphism of the CSN2 gene affected milk protein percentage with the highest values recorded in the CSN2 AA goats (4.35, at P < 0.001). The CSN1S2 AC goats provided the highest fat (51.02 g/day) and protein (41.42 g/day) (P < 0.01) production. This information can be incorporated into selection schemes for the Sarda breed goat.
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Affiliation(s)
- G M Vacca
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, via Vienna 2, Sassari, 07100, Italy; Centro di Competenza Biodiversità Animale, viale Adua 2C, Sassari, 07100, Italy
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New insights in goat breeds of Ethiopia: High content of αs1-CN and its association with coagulation properties, whey syneresis and micelle size. Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2014.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Pazzola M, Dettori M, Pira E, Noce A, Paschino P, Vacca G. Effect of polymorphisms at the casein gene cluster on milk renneting properties of the Sarda goat. Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2013.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mestawet T, Girma A, Ådnøy T, Dagnachew B, Sundsaasen K, Lien S, Kent M, Devold T, Narvhus J, Vegarud G. New genetic polymorphism at the αs1-casein gene region in Ethiopian indigenous goat breeds. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2013.03.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mestawet TA, Girma A, Adnøy T, Devold TG, Vegarud GE. Newly identified mutations at the CSN1S1 gene in Ethiopian goats affect casein content and coagulation properties of their milk. J Dairy Sci 2013; 96:4857-69. [PMID: 23706484 DOI: 10.3168/jds.2012-6467] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 04/10/2013] [Indexed: 11/19/2022]
Abstract
Very high casein content and good coagulation properties previously observed in some Ethiopian goat breeds led to investigating the αs1-casein (CSN1S1) gene in these breeds. Selected regions of the CSN1S1 gene were sequenced in 115 goats from 5 breeds (2 indigenous: Arsi-Bale and Somali, 1 exotic: Boer, and 2 crossbreeds: Boer × Arsi-Bale and Boer × Somali). The DNA analysis resulted in 35 new mutations: 3 in exons, 3 in the 5' untranslated region (UTR), and 29 in the introns. The mutations in exons that resulted in an amino acid shift were then picked to evaluate their influence on individual casein content (αs1-, αs2-, β-, and κ-CN), micellar size, and coagulation properties in the milk from the 5 goat breeds. A mutation at nucleotide 10657 (exon 10) involved a transversion: CAG→CCG, resulting in an amino acid exchange Gln77→Pro77. This mutation was associated with the indigenous breeds only. Two new mutations, at nucleotide 6072 (exon 4) and 12165 (exon 12), revealed synonymous transitions: GTC→GTT in Val15 and AGA→AGG in Arg100 of the mature protein. Transitions G→A and C→T at nucleotides 1374 and 1866, respectively, occurred in the 5' UTR, whereas the third mutation involved a transversion T→G at nucleotide location 1592. The goats were grouped into homozygote new (CC), homozygote reference (AA), and heterozygote (CA) based on the nucleotide that involved the transversion. The content of αs1-CN (15.32g/kg) in milk samples of goats homozygous (CC) for this newly identified mutation, Gln77→Pro77 was significantly higher than in milks of heterozygous (CA; 9.05g/kg) and reference (AA; 7.61g/kg) genotype animals. The αs2-, β-, and κ-CN contents showed a similar pattern. Milk from goats with a homozygous new mutation had significantly lower micellar size. Milk from both homozygote and heterozygote new-mutation goats had significantly shorter coagulation rate and stronger gel than the reference genotype. Except the transversion, the sequence corresponded to allele A and presumably derived from it. Therefore, this allele is denoted by A3. All goats from the reference genotype (AA) were homozygous for the allele at nucleotide position 1374 and 1866, whereas all mutations in the 5' UTR existed in a heterozygous form in both heterozygous (CA) and the new mutation (CC) genotype. The newly identified mutation (CC) detected in some of the goat breeds is, therefore, important in selection for genetic improvement and high-quality milk for the emerging goat cheese-producing industries. The finding will also benefit farmers raising these goat breeds due to the increased selling price of goats. Further studies should investigate the effect of this amino acid exchange on the secondary and tertiary structure of the αs1-CN molecule and on the susceptibility of peptide hydrolysis by digestive enzymes.
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Affiliation(s)
- T A Mestawet
- Department of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, Ås, Norway.
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Vacca GM, Daga C, Pazzola M, Carcangiu V, Dettori ML, Cozzi MC. D-loop sequence mitochondrial DNA variability of Sarda goat and other goat breeds and populations reared in the Mediterranean area. J Anim Breed Genet 2010; 127:352-60. [PMID: 20831559 DOI: 10.1111/j.1439-0388.2010.00863.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G M Vacca
- Department of Animal Biology, University of Sassari, Sassari, Italy Department of Animal Science, University of Milano, Milano, Italy
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