Equilibria and kinetic of oxygen and carbon monoxide binding to the haemoglobin of the South American lungfish,Lepidosiren paradoxa

• 1. The haemoglobin of the South American lungfishLepidosiren paradoxa has a single component.
• 2. The equilibria of this respiratory protein with oxygen have been investigated both in the blood and with the purified haemoglobin. There is a substantial, normal, alkaline Bohr effect and marked sensitivity to organic phosphates in the haemoglobin solutions.
• 3. Studies on the pH dependence of the kinetics of oxygen dissociation can be interpreted in terms of a normal Bohr effect.
• 4. The kinetics of combination of carbon monoxide have an unusual pH dependence.
• 5. These findings are discussed in terms of the two-state model of Monodet al. (1965)

     

Antagonists to sex pheromones of the American cockroach

• 1.1. Considering the structures of periplanones A (1) and B (2) (sex pheromones of the American cockroach), derivatives of germacrene D (3) were prepared in order to find antagonists to the pheromones.
• 2.2. A new sex pheromone mimic (7) was found in the derivatives. Among pheromonally inactive derivatives, compounds 5 and 6 were found as a specific antagonist of 1 and a non-specific antagonist of 1 and 2, respectively.
• 3.3. In the DS-EAG experiment, 5 was revealed to participate specifically in the periplanone A receptor and to inhibit further participation of 1 in the receptor.

     

Effects of Acetylation and Phosphorylation on Subunit Interactions in Three Large Eukaryotic Complexes

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Highlights

• •Novel PTMs detected in native yeast exosome, RNA polymerase II and proteasome.
• •MD based approach outperforms published tools in predicting PTMs stability effect.
• •Dynamical approach reveals long range effects of PTMs on subunits binding.
• •Acetylations may have a role in local stabilization of protein complex formation.

     

Transcultural Diabetes Care in The United States – A Position Statement by the American Association of Clinical Endocrinologists

The American Association of Clinical Endocrinologists (AACE) has created a transculturalized diabetes chronic disease care model that is adapted for patients across a spectrum of ethnicities and cultures. AACE has conducted several transcultural activities on global issues in clinical endocrinology and completed a 3-city series of conferences in December 2017 that focused on diabetes care for ethnic minorities in the U.S. Proceedings from the “Diabetes Care Across America” series of transcultural summits are presented here. Information from community leaders, practicing health care professionals, and other stakeholders in diabetes care is analyzed according to biological and environmental factors. Four specific U.S. ethnicities are detailed: African Americans, Latino/Hispanics, Asian Americans, and Native Americans. A core set of recommendations to culturally adapt diabetes care is presented that emphasizes culturally appropriate terminology, transculturalization of white papers, culturally adapting clinic infrastructure, flexible office hours, behavioral medicine—especially motivational interviewing and building trust—culturally competent nutritional messaging and health literacy, community partnerships for care delivery, technology innovation, clinical trial recruitment and retention of ethnic minorities, and more funding for scientific studies on epigenetic mechanisms of cultural impact on disease expression. It is hoped that through education, research, and clinical practice enhancements, diabetes care can be optimized in terms of precision and clinical outcomes for the individual and U.S. population as a whole.Lay AbstractThe American Association of Clinical Endocrinologists (AACE) has created a diabetes care model for patients of different backgrounds. AACE led meetings in New York, Houston, and Miami with health care professionals and community leaders to improve diabetes care. Information from these meetings looked at biological and environmental diabetes risks. Four American patient groups were studied: African Americans, Latinos, Asian Americans, and Native Americans. Diabetes care should use culturally appropriate language and search for better ways to apply science and clinic design. Talking to patients more clearly can improve their diabetes control. There are many other needed changes in the American health care system discussed in this paper. It is hoped that through better education, research, and practice, diabetes care can be improved for the entire U.S. population. This means that important differences among patients' ethnic and cultural backgrounds are addressed.Executive Summary

• Cultural adaptation of evidence-based recommendations is a necessary component of optimal diabetes care.
• Biological factors that contribute to the pathophysiology of diabetes vary according to race and ethnicity and can be affected by social determinants that vary with culture.
• The “Transcultural Diabetes Nutrition Algorithm” was developed in 2010 to optimize diabetes nutrition care globally and represents a validated methodology where evidence-based recommendations from a source culture can be adapted and implemented in a different culture using a toolkit.
• The 2015 AACE Pan-American Workshop examined diabetes care in 9 Latin American nations and concluded that there should only be one level of diabetes care for a population and that level should be “excellent;” also, that A1C measurements should be utilized and that more educational and nutritional options are needed to optimize diabetes care.
• The “Diabetes Care Across America – A Series of Transcultural Summits” was an AACE program conducted in 2017 in New York, Houston, and Miami to examine cultural factors that influence diabetes care domestically; the findings of this program are presented here.
• The African American, Hispanic/Latino, Asian American, and Native American populations are each comprised of different ancestries, anthropometrics/body compositions and physical appearances, and cultures and degrees of acculturation, with a significant evidence base that associates specific gene variants with specific phenotypic traits affecting diabetes care.
• For each ethno-cultural population, health messaging and diabetes care will need to consider issues of potential distrust of health care professionals, history of discrimination, religious practices, food preferences, attitudes toward physical activity, and despite the full range of socio-economics, the impact of poverty on engagement, self-monitoring, adherence with lifestyle and medical recommendations, and recruitment for clinical trials.
• Diabetes care should be as precise as possible, incorporating clinical trial evidence that best reflects the ethno-cultural attributes of a specific patient, with particular emphasis on cardiovascular disease risk mitigation, technology to assess the effects of eating patterns on glycemic status, adjusting traditional eating patterns to more healthy options that are still acceptable to the patient, flexibility in lifestyle and medication recommendations that take into account cultural factors, and the utilization of community-based resources to improve implementation.
• Pragmatic first steps to prepare a diabetes practice for an ethno-culturally diverse patient population include: learning more about biological-cultural interactions; gaining experience with lifestyle and behavioral medicine, especially motivational interviewing; creating a safe and immersive clinical environment; incorporating translation services, social prescribing, wearable technologies, web-based resources, and community engagement; and establishing referral networks with clinical trialists in diabetes research to improve recruitment of different populations.

ABSTRACTAbbreviations: A1C = hemoglobin A1c; AACE = American Association of Clinical Endocrinologists; ABCD = adiposity-based chronic disease; BMI = body mass index; CPA = clinical practice algorithm; CPG = clinical practice guideline; DBCD = dysglycemia-based chronic disease; DPP = Diabetes Prevention Program; GWAS = genome-wide association study; HCP = health care professional(s); IHS = Indian Health Service; LDL = low-density lipoprotein; MetS = metabolic syndrome; T2D = type 2 diabetes mellitus; tDNA = transcultural Diabetes Nutrition Algorithm; TG = triglyceride; WC = waist circumference     

Sodium and potassium balance of captive meadow voles (Microtus pennsylvanicus) fed laboratory chow and vegetation diets

• 1.1. Mineral balance was studied in meadow voles (Microtus pennsylvanicus) maintained in the laboratory.
• 2.2. Urine and fecal Na⁺ contents of voles on low-Na⁺ diets were comparable to those reported for other herbivore species, but urine and fecal K levels were higher.
• 3.3. Voles approached Na⁺ balance (input = output) on diets with Na⁺ content as low as 56 ppm.
• 4.4. There was not a clearcut hypertrophy of the adrenal-gland zona glomerulosa in voles maintained on low-Na⁺ diets.
• 5.5. Plasma K content and bone water content were higher in voles maintained on high-Na ⁺ vegetation diets, suggesting expansion of extracellular fluid volume.

     

The Proteome of Pig Spermatozoa Is Remodeled During Ejaculation

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Highlights

• •Proteome of mature boar spermatozoa from cauda epididymal and ejaculated sources were analyzed by iTRAQ-based LC-MS/MS.
• •1,723 sperm proteins identified (974 of Sus scrofa taxonomy).
• •1,602 sperm proteins quantified (960 of Sus scrofa taxonomy).
• •32 Sus scrofa sperm proteins were differentially expressed among sperm sources.
• •The proteome of boar spermatozoa is remodelled during ejaculation.

     

Metabolic and behavioral responses of American kestrels to food deprivation

• 1.1. The effect of short-term (79 hr) food deprivation at 27°C on body mass, locomotor activity, body temperature (T_b), and resting oxygen consumption was determined in eleven American kestrels (Falco sparverius).
• 2.2. The change in body mass during resting followed the relation, % mass remaining = 99 e^{0.07(days fasting)}. There was no significant difference in the rate of relative mass loss between males and females.
• 3.3. Locomotor activity, measured as perch hopping, was highly variable in both control and fasted birds and showed no correlation with stage of the fast, basal metabolic rate (BMR), or rate of mass loss during food deprivation.
• 4.4. Body temperatures of fasted birds declined continuously by 0.2–0.4°C per day from 39.3 to 38.3°C.
• 5.5. Both males and females responded to food deprivation with a decrease in metabolism. By the third night of fasting, BMR had declined 23.4% from 0.845 W (bird day)⁻¹ to 0.647 W (bird day)⁻¹. The observed reduction in BMR is 2.4 times that expected from a 1°C decline in T_b (assuming Q₁₀ = 2.5) indicating active suppression of metabolism.

     

Purification and characterization of vitellogenin from the American cockroach,Periplaneta americana

• 1.1. Vitellogenin (VG) was isolated and purified from the hemolymph of female American cockroaches.
• 2.2. The purification method used in this study comprises two steps: the first step is based on the method originally developed for purifying lipophorin from hemolymph, and the second step is the separation of VG from lipophorin by a KBr density gradient ultracentrifugation.
• 3.3. The purified VG was characterized according to molecular weight, substructure, shape and size, and lipid composition.
• 4.4. The VG molecule is almost globular in shape with the diameter of about 15.5 nm and is indistinguishable from lipophorin in shape and size.
• 5.5. The native molecular weight determined by light scattering method was 560 kDa.
• 6.6. The VG consists of four subunits with molecular weights of approximately 102, 81, 49 and 40 kDa, respectively.
• 7.7. VG is a lipoprotein and comprises 92% protein and 8% lipid.
• 8.8. Major lipid components were found to be diacylglycerol (25%) and phospholipids (71%).

     

Chemical cross-links of proteins by using bifunctional reagents

• 1.1. The chemical identification of spatial arrangements of the subunits in oligomeric proteins is exclusively achieved by the analysis of the reaction products of the protein and bifunctional reagents.
• 2.2. Since the pioneer work of Hartman and Wold (Biochemistry6, 2439–2448, 1967) the bifunctional reagent such as bis-imido-esters was first introduced into protein chemistry.
• 3.3. We have listed the non-cleavable and cleavable bis-imido-esters, the N-hydroxy-succinimido-csters and the aryl azides which once photolyzed, become the highly reactive nitrene intermediates.
• 4.4. Different reagents classified as homo- and hetero-bifunctional reagents are also listed.
• 5.5. The advantages and limits of each group as well as their chemical properties are advanced and extensively discussed.

     

Multi-isotype Glycoproteomic Characterization of Serum Antibody Heavy Chains Reveals Isotype- and Subclass-Specific N-Glycosylation Profiles

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Highlights

• •nLC-MS/MS method to analyze immunoglobulin (Ig) N-glycopeptides from human serum.
• •Multi-isotype, site-specific characterization of immunoglobulin N-glycosylation.
• •IgA2 sequence and glycosylation-site variant analyses.
• •Platform to define disease-specific N-glycan signatures for different Ig isotypes.

     

Integrated Analysis of Transcriptomic,miRNA and Proteomic Changes of a Novel Hybrid Yellow Catfish Uncovers Key Roles for miRNAs in Heterosis

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Highlights

• •mRNA-seq, miRNA-seq, proteomes of P. fulvidraco, P. vachelli, hybrid Huangyou-1.
• •Predicted miRNA-mRNA-protein pairs were found and validated by qRT-PCR and PRM.
• •Immune, metabolism, digestion, absorption, proliferation, development generate heterosis.
• •High parental gene/protein with low parental miRNAs inherit from the mother or father.

     

A New Tool to Reveal Bacterial Signaling Mechanisms in Antibiotic Treatment and Resistance

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Highlights

• •Quantitative (phospho)proteome analysis of antibiotic treatment in E. coli.
• •Largest bacterial phosphorylation catalogue.
• •Specific phosphorylation motifs changes during resistance development.
• •Phosphorylation mediated signaling could be a potential target for drug design.

     

Knockout of the Hmt1p Arginine Methyltransferase in Saccharomyces cerevisiae Leads to the Dysregulation of Phosphate-associated Genes and Processes

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Highlights

• •Knockout of arginine methyltransferase Hmt1p in S. cerevisiae was investigated.
• •RNA-seq and SILAC MS/MS found downregulation of phosphate-associated processes.
• •Phosphate homeostasis and extracellular levels of acid phosphatases were perturbed.
• •Pho4p was an in vitro Hmt1p substrate, but this was not confirmed in vivo.

     

Phytoplasma-induced Changes in the Acetylome and Succinylome of Paulownia tomentosa Provide Evidence for Involvement of Acetylated Proteins in Witches' Broom Disease

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Highlights

• •Quantitative global proteome, acetylome and succinylome of phytoplasma-infected Paulownia tomentosa seedlings.
• •Acetylation may be more important than succinylation in response to phytoplasma infection.
• •Acetylation modified the activities of POR and RuBisCO.
• •Possible model to elucidate the molecular mechanism responses to PaWB from proteome and PTMs.

     

Comparative Secretome Analyses of Human and Zoonotic Staphylococcus aureus Isolates CC8, CC22, and CC398

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Highlights

• •Proteogenomics and secretome comparison of human and zoonotic Staphylococcus aureus lineages.
• •869 secreted proteins identified in eight S. aureus isolates of CC8, CC22 and CC398.
• •CC398 lower secretion of surface proteins and higher secretion of hemolysins and exoenzymes.
• •Regulatory differences in the secretomes could be linked to lower SigB activity in CC398.

     

Whole Proteome Profiling of N-Myristoyltransferase Activity and Inhibition Using Sortase A

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Highlights

• •Application of Sortase A to label protein N-termini across the whole proteome.
• •Novel gel, proteomic and ELISA-based methods to determine N-myristoylation of proteins in cells, without metabolic labelling.
• •Side by side mass spectrometric quantification of changes in protein N-myristoylation by two complementary methods.
• •Improved Biotin-Neutravidin affinity enrichment protocol.

     

Precision De Novo Peptide Sequencing Using Mirror Proteases of Ac-LysargiNase and Trypsin for Large-scale Proteomics

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Highlights

• •The developed Ac-LysargiNase showed higher stability and activity than before.
• •The merged spectra of the mirror peptides achieved nearly complete ion coverage.
• •pNovoM obviously increased the efficiency and accuracy of peptide sequencing.
• •The mirror enzymatic strategy achieved precision de novo sequencing on proteome scales.

     

Multidimensional Proteomics Identifies Declines in Protein Homeostasis and Mitochondria as Early Signals for Normal Aging and Age-associated Disease in Drosophila,

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Highlights

• •Proteomic landscapes of Drosophila somatic and reproductive tissues during aging.
• •Pulsed metabolic labeling determines a decline in protein synthesis with age.
• •Drosophila model of human Parkinson's disease signifies an early-onset decline in protein synthesis.
• •Collapse of proteostasis and mitochondria are early signals for normal aging.

     

Comparative Secretome Analyses of Primary Murine White and Brown Adipocytes Reveal Novel Adipokines

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Highlights

• •First comparative proteomic analysis of white and brown adipocyte secretomes.
• •100 novel adipokines differentially secreted from white versus brown adipocytes.
• •Functionally enriched protein class changes in white and brown adipocytes.
• •200 novel, NE-responsive adipokines from brown adipocytes.

     

Decreased Antibiotic Susceptibility Driven by Global Remodeling of the Klebsiella pneumoniae Proteome

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Highlights

• •Global proteomic remodeling alters antibiotic susceptibility in K. pneumoniae.
• •Drug specific transport, sugar utilization, central metabolism, capsule synthesis.
• •Common pathways of reactive oxygen scavenging, turnover of misfolded proteins.
• •Integrated adjustments and unique drug-specific features for drug combinations.