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C4999

Sigma-Aldrich

Proinsulin C-Peptide (55-89) human

≥95% (HPLC)

Synonym(s):

Proinsulin connecting peptide

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About This Item

Empirical Formula (Hill Notation):
C153H259N49O52
CAS Number:
11097-48-6
Molecular Weight:
3616.99
MDL number:
MFCD00076294
UNSPSC Code:
12352209
PubChem Substance ID:
329775073
NACRES:
NA.26

product name

Proinsulin C-Peptide (55-89) human, bioactive peptide hormone

Quality Level

200

assay

≥95% (HPLC)

form

powder

color

white

storage temp.

−20°C

SMILES string

CC(C)C[C@H](NC(=O)[C@H](CCC(O)=O)NC(=O)[C@@H](NC(=O)[C@H](CCC(N)=O)NC(=O)CNC(=O)[C@@H](NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](C)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@@H](N)CCCNC(N)=N)C(C)C)C(C)C)C(=O)NCC(=O)NCC(=O)NCC(=O)N1CCC[C@H]1C(=O)NCC(=O)N[C@@H](C)C(=O)NCC(=O)N[C@@H](CO)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N2CCC[C@H]2C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(O)=O)C(=O)NCC(=O)N[C@@H](CO)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(O)=O

InChI

1S/C153H259N49O52/c1-71(2)55-94(193-134(237)91(40-48-119(222)223)189-148(251)122(78(15)16)200-135(238)86(33-41-105(156)205)179-112(212)67-175-147(250)121(77(13)14)199-136(239)88(35-43-107(158)207)188-139(242)97(58-74(7)8)194-142(245)100(61-120(224)225)197-133(236)90(39-47-118(220)221)182-124(227)80(18)177-129(232)89(38-46-117(218)219)186-130(233)84(29-23-51-167-152(162)163)183-126(229)82(155)27-22-50-166-151(160)161)128(231)172-63-110(210)169-62-109(209)170-68-115(215)201-53-25-31-103(201)145(248)174-64-111(211)176-79(17)123(226)171-65-113(213)180-101(69-203)144(247)196-99(60-76(11)12)141(244)190-92(36-44-108(159)208)149(252)202-54-26-32-104(202)146(249)198-95(56-72(3)4)137(240)178-81(19)125(228)192-96(57-73(5)6)138(241)185-85(37-45-116(216)217)127(230)173-66-114(214)181-102(70-204)143(246)195-98(59-75(9)10)140(243)187-87(34-42-106(157)206)132(235)184-83(28-20-21-49-154)131(234)191-93(150(253)254)30-24-52-168-153(164)165/h71-104,121-122,203-204H,20-70,154-155H2,1-19H3,(H2,156,205)(H2,157,206)(H2,158,207)(H2,159,208)(H,169,210)(H,170,209)(H,171,226)(H,172,231)(H,173,230)(H,174,248)(H,175,250)(H,176,211)(H,177,232)(H,178,240)(H,179,212)(H,180,213)(H,181,214)(H,182,227)(H,183,229)(H,184,235)(H,185,241)(H,186,233)(H,187,243)(H,188,242)(H,189,251)(H,190,244)(H,191,234)(H,192,228)(H,193,237)(H,194,245)(H,195,246)(H,196,247)(H,197,236)(H,198,249)(H,199,239)(H,200,238)(H,216,217)(H,218,219)(H,220,221)(H,222,223)(H,224,225)(H,253,254)(H4,160,161,166)(H4,162,163,167)(H4,164,165,168)/t79-,80-,81-,82-,83-,84-,85-,86-,87-,88-,89-,90-,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,102-,103-,104-,121-,122-/m0/s1

InChI key

JEPNOJXFZHBCTB-ZCUALFGZSA-N

Amino Acid Sequence

Arg-Arg-Glu-Ala-Glu-Asp-Leu-Gln-Val-Gly-Gln-Val-Glu-Leu-Gly-Gly-Gly-Pro-Gly-Ala-Gly-Ser-Leu-Gln-Pro-Leu-Ala-Leu-Glu-Gly-Ser-Leu-Gln-Lys-Arg

General description

Human proinsulin, the single-chain peptide precursor of insulin, consists of the insulin A and B chains connected by the 31 amino acid C-peptide. Cleavage of proinsulin by proteolytic enzymes produces insulin and free C-peptide. The product here is the 35-mer peptide (Arg−Arg-C-Peptide-Lys-Arg) observed to separate the insulin A and B chains.

Biochem/physiol Actions

C-Peptide Fragment (55-89) is a fragment derived from the proinsulin C-peptide. C-peptide has cell signaling activity that involves calcium-dependent intracellular signaling. C-Peptide Fragment 55-89 may be used to help researchers understand the role of specific sequences within the C-peptide in binding, conformation and function of C-peptide.
C-Peptide was initially thought to have no intrinsic biological activity. More recent research has identified multiple biological effects of C-peptide, including binding to cell membranes, activation of signaling pathways, and stimulation of Na+,K+-ATPase and endothelial nitric oxide synthetase. However, the exact function of C-peptide is unclear due to conflicting physiological effects.

Other Notes

Lyophilized from 0.1% TFA in H2O

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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C-Peptide: A new mediator of atherosclerosis in diabetes.
Vasic, D., and Walcher, D.
Mediators of Inflammation, 858692-858692 (2012)
R S Mughal et al.
Diabetologia, 53(8), 1761-1771 (2010-05-13)
Endothelial cells (ECs) and smooth muscle cells (SMCs) play key roles in the development of intimal hyperplasia in saphenous vein (SV) bypass grafts. In diabetic patients, insulin administration controls hyperglycaemia but cardiovascular complications remain. Insulin is synthesised as a pro-peptide
Proinsulin C-peptide prevents type-1 diabetes-induced decrease of renal Na+-K+-ATPase α1-subunit in rats.
Nordquist L, Shimada K, et al.
Diabetes and Metabolism, 26, 193-199 (2010)
John Wahren et al.
Experimental diabesity research, 5(1), 15-23 (2004-06-17)
New results present C-peptide as a biologically active peptide hormone in its own right. Although C-peptide is formed from proinsulin and cosecreted with insulin, it is a separate entity with biochemical and physiological characteristics that differ from those of insulin.
Intracellular signaling by C-peptide.
Hills, C.E. and Brunskill, N.J.
Experimental Diabetes Research, 635158-635158 (2008)
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