Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5725
Number of amino acids:321
Molecular Weight:34950.4 Da
Theoretical pI:9.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)237.17%
Cysteine CYS (C)92.8%
Glutamic Acid GLU (E)113.43%
Aspartic Acid ASP (D)216.54%
Glycine GLY (G)288.72%
Phynylalanine PHE (F)185.61%
Isoleucine ILE (I)123.74%
Histidine HIS (H)41.25%
Lysine LYS (K)247.48%
Methionine MET (M)92.8%
Leucine LEU (L)3611.22%
Asparagine ASN (N)154.67%
Glutamine GLN (Q)72.18%
Proline PRO (P)134.05%
Serine SER (S)268.1%
Arginine ARG (R)185.61%
Threonine THR (T)185.61%
Tryptophan TRP (W)10.31%
Valine VAL (V)237.17%
Tyrosine TYR (Y)51.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1543
HydrogenH2486
NitrogenN430
OxygenO457
SulphurS18

FormulaC1543H2486N430O457S18
Total Number of Atoms:4934


Total number of positively charged residues (ARG + LYS):42
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    13450
Absorption 0.1% (=1 g/l)    0.385,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.371,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.59, 25.55, 24.61]

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:86.2619
Grand average of hydropathicity (GRAVY):-0.10