Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5400
Number of amino acids:372
Molecular Weight:40541.54 Da
Theoretical pI:7.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)308.06%
Cysteine CYS (C)225.91%
Glutamic Acid GLU (E)123.23%
Aspartic Acid ASP (D)205.38%
Glycine GLY (G)379.95%
Phynylalanine PHE (F)174.57%
Isoleucine ILE (I)184.84%
Histidine HIS (H)123.23%
Lysine LYS (K)123.23%
Methionine MET (M)92.42%
Leucine LEU (L)164.3%
Asparagine ASN (N)195.11%
Glutamine GLN (Q)133.49%
Proline PRO (P)174.57%
Serine SER (S)4010.75%
Arginine ARG (R)205.38%
Threonine THR (T)154.03%
Tryptophan TRP (W)102.69%
Valine VAL (V)225.91%
Tyrosine TYR (Y)112.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1761
HydrogenH2672
NitrogenN510
OxygenO535
SulphurS31

FormulaC1761H2672N510O535S31
Total Number of Atoms:5509


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72765
Absorption 0.1% (=1 g/l)    1.795,   assuming all pairs of CYS residues form cystines

Ext. coefficient    71390
Absorption 0.1% (=1 g/l)    1.761,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.62

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.27, 30.38, 18.01]

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:60.8602
Grand average of hydropathicity (GRAVY):-0.27