Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4629
Number of amino acids:718
Molecular Weight:79759.1 Da
Theoretical pI:8.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)395.43%
Cysteine CYS (C)91.25%
Glutamic Acid GLU (E)324.46%
Aspartic Acid ASP (D)263.62%
Glycine GLY (G)719.89%
Phynylalanine PHE (F)334.6%
Isoleucine ILE (I)446.13%
Histidine HIS (H)141.95%
Lysine LYS (K)456.27%
Methionine MET (M)182.51%
Leucine LEU (L)618.5%
Asparagine ASN (N)435.99%
Glutamine GLN (Q)294.04%
Proline PRO (P)405.57%
Serine SER (S)598.22%
Arginine ARG (R)253.48%
Threonine THR (T)365.01%
Tryptophan TRP (W)162.23%
Valine VAL (V)446.13%
Tyrosine TYR (Y)344.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3611
HydrogenH5540
NitrogenN954
OxygenO1036
SulphurS27

FormulaC3611H5540N954O1036S27
Total Number of Atoms:11168


Total number of positively charged residues (ARG + LYS):70
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    139160
Absorption 0.1% (=1 g/l)    1.745,   assuming all pairs of CYS residues form cystines

Ext. coefficient    138660
Absorption 0.1% (=1 g/l)    1.738,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.25

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.31, 29.67, 20.89]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:80.2367
Grand average of hydropathicity (GRAVY):-0.25