Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6125
Number of amino acids:92
Molecular Weight:10308.05 Da
Theoretical pI:8.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)55.43%
Cysteine CYS (C)88.7%
Glutamic Acid GLU (E)22.17%
Aspartic Acid ASP (D)55.43%
Glycine GLY (G)55.43%
Phynylalanine PHE (F)22.17%
Isoleucine ILE (I)44.35%
Histidine HIS (H)22.17%
Lysine LYS (K)55.43%
Methionine MET (M)22.17%
Leucine LEU (L)1314.13%
Asparagine ASN (N)33.26%
Glutamine GLN (Q)55.43%
Proline PRO (P)66.52%
Serine SER (S)1010.87%
Arginine ARG (R)66.52%
Threonine THR (T)22.17%
Tryptophan TRP (W)33.26%
Valine VAL (V)33.26%
Tyrosine TYR (Y)11.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC449
HydrogenH720
NitrogenN130
OxygenO128
SulphurS10

FormulaC449H720N130O128S10
Total Number of Atoms:1437


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18490
Absorption 0.1% (=1 g/l)    1.794,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17990
Absorption 0.1% (=1 g/l)    1.745,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 72.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.26, 26.09, 23.91]

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:86.9564
Grand average of hydropathicity (GRAVY):-0.13