Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5303
Number of amino acids:569
Molecular Weight:63901.24 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)376.5%
Cysteine CYS (C)81.41%
Glutamic Acid GLU (E)223.87%
Aspartic Acid ASP (D)193.34%
Glycine GLY (G)386.68%
Phynylalanine PHE (F)305.27%
Isoleucine ILE (I)447.73%
Histidine HIS (H)162.81%
Lysine LYS (K)305.27%
Methionine MET (M)122.11%
Leucine LEU (L)407.03%
Asparagine ASN (N)447.73%
Glutamine GLN (Q)274.75%
Proline PRO (P)407.03%
Serine SER (S)264.57%
Arginine ARG (R)203.51%
Threonine THR (T)437.56%
Tryptophan TRP (W)81.41%
Valine VAL (V)396.85%
Tyrosine TYR (Y)264.57%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2905
HydrogenH4460
NitrogenN770
OxygenO818
SulphurS20

FormulaC2905H4460N770O818S20
Total Number of Atoms:8973


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83240
Absorption 0.1% (=1 g/l)    1.303,   assuming all pairs of CYS residues form cystines

Ext. coefficient    82740
Absorption 0.1% (=1 g/l)    1.295,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.03

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.86, 26.01, 19.51]

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:83.9543
Grand average of hydropathicity (GRAVY):-0.20