Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4836
Number of amino acids:618
Molecular Weight:69256.98 Da
Theoretical pI:5.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)325.18%
Cysteine CYS (C)345.5%
Glutamic Acid GLU (E)447.12%
Aspartic Acid ASP (D)386.15%
Glycine GLY (G)477.61%
Phynylalanine PHE (F)243.88%
Isoleucine ILE (I)406.47%
Histidine HIS (H)50.81%
Lysine LYS (K)508.09%
Methionine MET (M)132.1%
Leucine LEU (L)467.44%
Asparagine ASN (N)345.5%
Glutamine GLN (Q)203.24%
Proline PRO (P)203.24%
Serine SER (S)497.93%
Arginine ARG (R)254.05%
Threonine THR (T)284.53%
Tryptophan TRP (W)111.78%
Valine VAL (V)355.66%
Tyrosine TYR (Y)233.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3039
HydrogenH4762
NitrogenN818
OxygenO937
SulphurS47

FormulaC3039H4762N818O937S47
Total Number of Atoms:9603


Total number of positively charged residues (ARG + LYS):75
Total number of negatively charged residues (ASP + GLU):82
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96895
Absorption 0.1% (=1 g/l)    1.399,   assuming all pairs of CYS residues form cystines

Ext. coefficient    94770
Absorption 0.1% (=1 g/l)    1.368,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.96, 24.27, 21.84]

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:75.8738
Grand average of hydropathicity (GRAVY):-0.34