Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3028
Number of amino acids:37
Molecular Weight:3925.56 Da
Theoretical pI:6.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.41%
Cysteine CYS (C)616.22%
Glutamic Acid GLU (E)12.7%
Aspartic Acid ASP (D)25.41%
Glycine GLY (G)410.81%
Phynylalanine PHE (F)38.11%
Isoleucine ILE (I)25.41%
Histidine HIS (H)12.7%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.7%
Asparagine ASN (N)12.7%
Glutamine GLN (Q)00%
Proline PRO (P)513.51%
Serine SER (S)25.41%
Arginine ARG (R)38.11%
Threonine THR (T)12.7%
Tryptophan TRP (W)00%
Valine VAL (V)38.11%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC168
HydrogenH259
NitrogenN49
OxygenO48
SulphurS6

FormulaC168H259N49O48S6
Total Number of Atoms:530


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    375
Absorption 0.1% (=1 g/l)    0.096,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.62

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.32, 32.43, 10.81]

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:60.5406
Grand average of hydropathicity (GRAVY):0.27